Ariana Grande Kardashian Cameo in 'Thank U, Next' Goes to ...

When Ariana Grande recruited a Kardashian to guest star in her highly anticipated "Thank U, Next" music video, she went straight to the top ... of the family tree.

Yes, TMZ has learned Kris Jenner is the mystery Kardashian who scored the cameo role. Take that, Kim, Kourtney, Khloe, Kylie, Kendall ... and Rob.

As we first reported ... Ariana's music vid -- which is an homage to several famous chick flicks -- drops on Friday, and the big question was which Kardashian she'd lined up to make their dancing debut.

Ariana posted a behind-the-scenes teaser of the making of the music vid -- check it out for some of the other celeb cameos.

We admit it, the odds-on fave had to be one of the sisters who frequently flaunt what they've got. Just remember, they all got it from their mama, which could explain why Kris landed the gig.

"Thank U, Next" has a ton of guests helping AG set up flicks like "13 Going on 30," "Mean Girls," "Legally Blonde" and "Bring it On."

We don't know exactly which movie Kris is getting dropped into ... but our best guess is Amy Poehler's "Cool Mom" from "Mean Girls."

Michael Blackson to Kim K Don't Blame Ecstasy, Thank Ray J And His Famous Genitals!!!

112718_michael_blackson_kal
DON'T BITE THE HAND THAT FEEDS
TMZ.com

Michael Blackson thinks Kim Kardashian should quit blaming ecstasy and spend way more time sucking up to Ray J for his sizable role in launching her celebrity.

We got the comedian at LAX Tuesday and asked him about Kim claiming she was high on ecstasy when she and Ray shot their infamous sex tape, and in a word ... he's disappointed.

Michael thinks it's wrong for her to make it seem like the drug is the only reason she banged Ray J on cam, because that doesn't give enough credit to Ray's family jewels.

112618_kim_kardashian_kal
X MARKS THE SPOT
E!

As we first reported ... sources close to Ray J insist Kim never touched ecstasy during the taping of their sex tape. Michael thinks it's a bit fishy for Kim just now mentioning the drug ... so many years after doing the deed.

Don't worry though, Ray's not getting the short end of the stick -- Michael dishes plenty of props to "d**k and balls!"

Kim Kardashian Ray J Sources Call BS on Ecstasy ... Kim Stands By Her Claim

Kim Kardashian never touched ecstasy during the filming of her sex tape with Ray J ... so insist sources directly connected to the 'Love & Hip Hop' star.

Kim claimed she took ecstasy twice -- once when she married her first husband back in 2000 and again when she filmed the tape in 2003 -- and she says both experiences were bad for her.

112618_kim_kardashian_kal
X MARKS THE SPOT
E!

Our Ray J sources say Kim took no hard drugs nor did she drink alcohol during the filming of the sex tape. They do say, however, she smoked pot around the time the tape was made ... and it was from a pipe shaped like a penis.

As for Kim saying her lip quivering was evidence she was on ecstasy, the Ray J sources fire back ... "her lip was quivering because she was getting ******."

Sources close to Kim tell us she stands by the claim she made on the show -- she did in fact take the drug before the tape was shot -- and she has nothing to gain from lying about it at this point in her life. We're told Kim is thankful to have learned early on from the experiences with drugs and attributes those lessons to her decision to not get heavily involved in drugs or alcohol through adulthood.

Our Ray J sources add he's offended that Kim would suggest she did the sex tape because she was in a significantly altered state. They say she was down with it from the beginning and all the way through.

Kim Kardashian I Was High on Ecstasy ... During Sex Tape, First Wedding

112618_kim_kardashian_kal
X MARKS THE SPOT
E!

Kim Kardashian says her jaw was shaking while she filmed her infamous sex tape with Ray J, but it's not what you think ... she was rollin' on X.

Scott Disick pulled it out of her during a convo on 'KUWTK'. The mother of 3 -- who is now super straight-laced -- recalled how she used the drug during her sex scene and during her first wedding ... the one to music producer Damon Thomas in 2000.

So, to hear her tell it, those were the only 2 times she did the drug -- "I did ecstasy once and I got married ... I did it again, I made a sex tape. Like, everything bad would happen."

Kim said her wild side is still there ... "I still can do crazy things." Well, not like that.

Kanye West Donates $500,000 To California Fire Relief

Kanye West is making a gigantic contribution toward relief for the brave men and women who put their lives on the line to battle the California wildfires.

Audience sources tell us Kim Kardashian will appear on 'Ellen' Wednesday and drop a massive surprise c/o her hubby. We're told during the show, Kim and Ellen shift their focus from Kim's new Glam Bible -- from her cosmetics company -- to the devastation of the wildfires.

Our sources say Kim revealed she and Kanye had a serious discussion on how they could ease the burden on those tasked with battling the inferno, and Kanye put an immediate plan into action.

We're told Kim tells Ellen that Kanye went to adidas and his Yeezy brand to drum up relief funds, and they were quick to raise $500,000.

During Wednesday's episode of 'Ellen' ... Kim will present a $200,000 check to the California Community Foundation's Wildfire Relief Fund and a $200,000 check to the California Fire Foundation.

On top of that ... we're told she'll present a $100k check to a firefighter and his wife who are also on 'Ellen' Wednesday. Michael Williams lost his own home, but continued to battle the fires and saved many of his neighbors' homes.

Grab your tissues.

TMZ broke the story ... the California fires came dangerously close to Kim and Kanye's Hidden Hills mansion, touching their property at one point. Many of the couple's neighbors praised them for hiring a private crew to help extinguish the flames and save many other homes.

Kanye & North West Daddy & Me Date Comes w/ Views ... & Brand New Yeezy Shoes!!

Kanye West's daughter, North, had the best seat in the house for their daddy-and-me date ... on top of Ye's shoulders. Good thing he brought comfy shoes.

North and her pops hit up the California Science Center in L.A. Sunday. Lots of cool things to see there -- like the Space Shuttle Endeavour -- and it's an outing that requires lots of walking. So, it's interesting Kanye chose this day to bust out his yet-to-be-released YEEZY Boost 700 VX.

Kinda hard to miss Ye make an entrance ... especially when he's wearing these fluorescent green Yeezy samples down low, and his adorable daughter on his shoulders.

He could use a fun day of daddy duty.

As we reported, the Woolsey fire crept right up to Kim and Kanye's property, and only a team of private firefighters saved them from catastrophe. Ye was also at the Bev Hills mansion when gunfire erupted on the set of his music video with Tekashi69.

Kanye's visit to the Science Center came just a couple days after he donated $150k to the family of a Chicago security guard killed by cops moments after he subdued a gunman.

Kim & Kanye's House Photo Makes it Clear ... Private Firefighting Team Saved Neighborhood

Pictures don't lie ... and now it's clear how Kim Kardashian and Kanye West saved their neighborhood by hiring a private team of firefighters.

Kimye's home in Hidden Hills stands intact and unscathed from the disastrous Woolsey fire ... but only by feet. The torched field is a testament to the proximity of the fire.

As we first reported ... Kim and Kanye hired a team of private firefighters to battle the blaze after the fire started to creep up on their pad. The house sits at the end of a cul-de-sac ... if their place went up in flames, it would have started a devastating domino effect on the rest of the neighborhood.

The move paid off big time 'cause Kim and Kanye's $60 million house -- along with countless others on the block -- were saved. But, as you can see, catastrophe came THIS close.

Dream's Birthday Party Make a Wish ... And Blow Out the Cockroach!!!

111518_kylie_jenner_kal_2
PARTY CRASHER

Kylie Jenner's video from Dream's second birthday party proves Auntie Kylie is the hostess with the mostest ... the mostest cockroaches.

Jenner hosted her niece's 2nd birthday party Wednesday at her Hidden Hills home ... and there was at least one uninvited guest patrolling the sweets table. The 6-legged party guest can be seen scurrying for cover underneath Dream's decked out bday cake.

As for how the critter may have entered the bash -- there are a ton of plants and foliage intertwined with the dessert spread -- so you gotta imagine he hitched a ride inside.

Cockroach guest or not, the party was still clearly a hit for Dream and all her guests with a homemade teepee, fairies and tons of presents.

Kris Jenner Buy My Son's Socks ... He Needs The Ca$h

Kris Jenner is swooping in to help Rob Kardashian make a quick buck off the holiday shopping season, plugging her son's sock line after he filed docs to have his child support payments to Blac Chyna lessened.

Kris and Rob unleashed a social media ad blitz Thursday, promoting a line of Christmas-themed socks that were just released by Arthur George, the clothing company Kris just bought a stake in.

It's funny ... the socks read, "Let's Get Baked," and Kris is calling them the perfect holiday gift. We can think of a few meanings for the phrase, and at least one belongs on the naughty list.

Rob followed Mom's lead and plugged the socks on his Twitter.

Kris and Rob teaming up to sell socks comes days after Rob went to court seeking to get a reduction in child support payments to Chyna ... he said he was basically broke after previously agreeing to pay Chyna $20,000 a month to support 2-year-old Dream.

We're told a judge is evaluating Rob's and Chyna's resources and has suspended Rob's entire obligation to pay any child support ... so this new deal with Kris could eventually play a role in the couple's ongoing child support war.

Dream Kardashian Teepee, Fairies & Bentley You Can't Top My 2nd Bday Bash!!!

Dream Kardashian clearly doesn't buy into the terrible twos theory ... not after having a magical birthday to celebrate.

Kim, Khloe, Kourtney and the rest of the brood threw an impressive birthday party for Rob and Blac Chyna's kid ... though we're guessing BC was nowhere in sight (more on that in a sec).

There was also a LOT to snack on. Seriously ... check out the spread. The fairy-themed party had it all -- 2 fairies, a teepee, tons of balloons ... and even a shiny Bentley.

As for Chyna ... she wasn't there, and that's not surprising. She and Rob do NOT get along, even though they've managed to co-parent. A year ago, they threw dueling birthday parties for Dream. They're also locked in a bitter fight over child support. For now, the judge has suspended Rob's obligation to pay Chyna $20k a month.

Rob's asking for a substantial reduction, and it's not out of the question Chyna could end up paying Rob since she's making a lot of money and they're sharing 50/50 joint custody.

Khloe & Tristan Still Together ... Doing Thanksgiving as a Family

Khloe Kardashian and Tristan Thompson are NOT broken up or on the rocks, contrary to reports -- but they could very well be breaking up a turkey wishbone very soon ... TMZ has learned.

Sources tell us ... rumors that Khloe and TT have split or are no longer talking in the wake of his cheating scandal are simply false -- they're still together and going strong.

We're told the reason Khloe hasn't been in Cleveland lately is that she's filming a new season of 'KUWTK.' Meanwhile, he's in the middle of his NBA season with the Cavs. Our sources say Khloe was supposed to fly out to Cleveland last week, but stayed in L.A. on account of the fires that were ravaging hers and surrounding communities.

And besides, would a couple on the verge of a split be spending time together on Thanksgiving? Probably not ... which is exactly what we're told Khloe's doing for the holiday. Sources say Khloe's going to Cleveland next week to be with Tristan and baby True as a family.

As we reported ... Khloe was at Tristan's game in Cleveland a couple weeks ago cheering him on. Her visit must've left some magic behind, 'cause Tristan's been on a tear lately. He racked up 21 rebounds in the Cavs' win over Charlotte Tuesday night.

Rob Kardashian & Blac Chyna It's Nasty in Court, But All Good on Co-Parent Home Front

Rob Kardashian and Blac Chyna might be duking it out in court over money to care for their daughter -- but turns out there's a measure of peace behind the scenes.

Sources connected to both parents tell us Rob and BC are a well-oiled co-parenting machine when it comes to baby Dream ... they've both been cooperative in creating and abiding by a fair schedule ... with zero hiccups so far.

We're told the former couple manages their 50/50 split like this -- 4 days with one parent and 3 days with the other ... and they switch that up week-to-week. Sometimes there's scheduling conflict with either Chyna or Rob, but they've learned to pivot without any real drama.

A big reason for their success ... nannies!!! We're told both Rob and Chyna have their own who handle all the baby hand-offs.

Here's the thing ... Rob and Chyna intensely dislike each other, but they have figured out a way to wall off their feelings when it comes to their daughter.

As we reported ... Rob's gone back to court asking a judge to lower his child support payments, which had been set at $20k/month. We're told Rob had planned to request the payments be chopped down from the get-go, and only agreed to the hefty child support to get Chyna to back off her domestic violence claims ... which could've hurt him.

Chyna's lawyer, Lisa Bloom, tells us Rob didn't pull a fast one on anybody -- saying they fully expected him to go back to go court to lower his payments.

For now, Chyna's not getting a penny from Rob. The judge put all payments on hold a few months ago until he decides what, if anything, Rob should pay her.

Kanye West Red (Hair) Alert It's Been a Tough Week

Kanye West's stepping out for the first time since the music video shooting scare ... with red hair.

Ye was out in L.A. Saturday afternoon with a new hairdo that was presumably for his music video shoot with Tekashi69. As we've reported ... Kanye and Tekashi were in the Beverly Hills mansion getting ready to film when gunfire erupted, prompting Ye to immediately bounce.

Cops are on the hunt for the shooters who were caught on video spraying the mansion with bullets. As if that wasn't scary enough ... Kanye's also had to deal with the California wildfire that's torched nearly a million acres.

We broke the story ... the fire burning out of control reached the estate of Kim and Kanye, who were forced to evacuate.

Caitlyn Jenner Malibu Home Just Escapes Flames

Caitlyn Jenner is lucky -- like Powerball lucky -- because her multi-million dollar Malibu home appears to have narrowly dodged any structural damage in SoCal's raging wildfire.

This aerial pic, shot Saturday morning, shows hot spots still smoldering just outside the fencing of Caitlyn's 3,500 square foot house -- which is perched in the hills above Malibu. On Friday a source connected to the Jenner-Kardashians told us the mansion had been torched -- they clearly spoke too soon.

It's clear, though, the Woolsey fire's path came dangerously close as it burned out of control toward the Malibu beach area.

110918_malibu_fire_kal
MALIBU BURNING
BACKGRID

Caitlyn posted a video Friday saying she was safe but did not know the fate of her home. She knows now ... it's safe.

In the immortal words of Maxwell Smart (Google it young'ins) ... "Missed it by that much!"

Kylie Jenner Travis Wasn't Peddling a Marriage Proposal

Kylie Jenner may have gotten a field of roses from baby daddy Travis Scott, but we know what she didn't get ... a ring.

Jenner's fans jumped the gun, going crazy after she posted a lengthy vid showing a gaggle of bouquets and rose petals strewn around her mansion. The track for her video is Travis' song, "Hell of a Night" ... her fav.

110918_kylie_kal
FEELING THE LOVE

It was undeniably romantic, but it wasn't a proposal. Sources close to Kylie tell us Travis' gesture was to celebrate the announcement Kylie Cosmetics was partnering with Ulta Beauty stores. It was also an elaborate bon voyage gift to mark the beginning of his tour. She and the baby are going with.

They'll be back December 22, just in time for Xmas ... together but not hitched.

Caitlyn Jenner Malibu Home Burns Down

Caitlyn Jenner's home in the Malibu hills is no more -- it was destroyed in Southern California's raging wildfires ... TMZ has learned.

Caitlyn's pad, which was featured on her reality show, sat on top of a ridge overlooking the Malibu beach area -- and, unfortunately, it is the same area where the Woolsey fire is burning out of control. Our sources say the home went up in flames Friday as the fire burned toward Malibu.

She has been in the home since 2015, and she's had to deal with natural disaster issues before. Just last year, winds as high as 60 MPH tore the roof off the 3,500 square foot, 4-bedroom spread.

As we reported, Kim Kardashian West ... as well as Khloe and Kourtney ... evacuated their homes on Thursday night. The fire finally reached Kim and Kanye's Hidden Hills mansion on Friday afternoon.

The fire's burned more than 14,000 acres so far, and forced the evacuation of more than 75,000 homes across Ventura and Los Angeles Counties.

110918_malibu_fire_kal
MALIBU BURNING
BACKGRID

Early Friday, officials issued a mandatory evacuation for all of Malibu as the blaze burned almost completely out of control.

Story developing ...