Holidaze

Heidi Klum did not disappoint when she revealed her highly-anticipated costume ... and ditto for the rest of the celebs who showed up.

Heidi arrived for her 20th annual Halloween bash Thursday night at Cathédrale Restaurant at Moxy East Village in NYC where she arrived in her goriest costume to date. Call it a mashup of alien and robot ... with faux guts and brains exposed and bolts and pipes attached to her body.

It took 12 hours to perfect the look ... and when it was complete she had a hankerin' to scare the bajeezus outta our camera guy.

Mariah Carey, Coco Austin, Ice-T and Reggie Bush were also on hand.

Over on the West Coast ... Kourtney Kardashian looked giddy in a cowgirl outfit for Kendall Jenner's shindig at the Blind Dragon in WeHo. Gigi Hadid looked SSSMOKIN!!!!

Miley Cyrus and Cody Simpson aren't just a fun couple -- they're a couple having fun with their fans ... especially for Halloween, when they opted for a 'Wedding' themed costume.

Miledy, or Comiley -- your choice -- busted out the eyeliner, spiked hair and leather to step out in NYC as Billy Idol and his 80s rocker GF, Perri Lister.

Idol and Lister were a music power couple in NYC after Idol released his 1983 album, "Rebel Yell." Now, Cody and Miley could've posted themselves rocking to any number of Idol hits -- "Rebel Yell," "Eyes Without a Face" come to mind -- but they went with "White Wedding."

Not that we think their whirlwind romance is heading to an altar anytime soon -- but they gotta know using that track will keep fans buzzing.

If the song wasn't enough -- there's also the PDA they packed on throughout the night ... including this half-naked one to end their evening. "After party" indeed!!!

Mariah Carey's blown away by what Kanye West is doing at his Sunday Services, and she plans to take a page out of his book ... to make Christmas even better!!!

The legendary singer was leaving Heidi Klum's Halloween party in NYC -- dressed up as the front woman for an '80s hair band -- when we asked about her song "My All" which Ye featured at a recent Service.

She tells us it's incredible and she loves what he's doing with the choir and church service aspect at the events ... and she's going to incorporate it into her upcoming Christmas shows.

Carey had previously tweeted that Kanye's choir was "killing this arrangement and song!" and added ... "I neeeed to speak to whoever put the arrangement together and rewrote the lyrics.. Beautiful. Thank you." Sounds like she got what she wanted.

If ya don't know, Mariah's been hyping up the rerelease of her iconic Xmas album, "Merry Christmas," which came out 25 years ago ... along with her All I Want For Christmas Is You Tour.

She's been playing with her fans on social media by telling them they gotta wait, but now that Friday, November 1 has arrived ... she says it's officially time to get in the spirit.

BTW -- according to Mariah's IG, her Halloween costume is part of a fictitious hair metal band called Spit ... and she's their lead singer, Mimi.

Another Halloween, another spooktacular day at the office for the TMZ staff!!!

We brought our A-game once again on October 31, with a wide variety of costumes honoring -- or poking fun at -- some of the year's biggest stories and the most notable names.

Robert Kraft, R. Kelly, Tekashi 6ix9ine, Lil Nas X, Billy Ray Cyrus, Taylor Swift and many more celebs were all fair game ... along with the college admissions scandal and the chicken sandwich wars.

Of course, there's gotta be some movie love, and we didn't disappoint with characters new and old like Mr. Rogers, the Genie from "Aladdin," Harley Quinn, Jack Torrance, the dog from "Legally Blonde" and the entire main cast of "Once Upon a Time in Hollywood."

Halloween's a lot like all the other holidays in one major way ... celebrities seem to have more fun doing it.

Huge stars like Drake, Kylie Jenner, LeBron James, Kevin Hart, Megan Thee Stallion, Jordyn Woods, Sofia Richie, Kyle Kuzma and a bunch more went all out with their costume selections ... which range from hot Disney princesses to Edward Scissorhands.

Of course, it wouldn't be Halloween if some famous folks didn't dress up as other famous folks, which is why Hart went as his pal, The Rock (in his infamous '90s fanny pack look), Kuzma rocked a Blueface costume ... and Drake got done up like his dad.

Click through the gallery ... 'cause you gotta see Chris Hemsworth and his wife, Elsa Pataky's commitment to creepy.

Hollywood is full of characters, and it looks like celebrities are even taking note of that!

The stars themselves have been taking advantage of dressing up for spooky season, and swapping their famous looks for another! From Alissa Violet as Britney Spears and Nina Dobrev as Billie Eilish to Lisa Rinna as Jennifer Lopez ... there are so many iconic looks going around for Halloween!!!

Get a good look at all the celebs switching things up for Halloween by seeing double in our gallery of stars dressed as stars ... see all the famous faces showing off their deja vu looks!!!

Some good news, bad news for LeBron James ...

The good news ... the NBA superstar doesn't seem concerned about the fires near his home anymore. He partied at the Dream Hotel on Tuesday night wearing a Halloween mask.

The bad news ... WEAK COSTUME, BRO!!!

Don't get it wrong, we love Mario Bros. -- Luigi is the beloved neglected younger brother -- but a dinky little mask?! You're better than that Bron!!!

Fact is, the Lakers star has had a rough week -- he was evacuated from his Brentwood home early Monday morning due to the raging Getty Fire and moved into a nearby hotel.

Unclear if Bron is back in his home yet (the fire is still a threat according to officials), but James sent a taco truck to the first responders on Tuesday to show his appreciation.

Great work, now upgrade that mask!!!

Y'know those massive escalators at Universal Studios Hollywood? Well, imagine a food cart careening down them with innocent people in the line of fire -- and now watch this video of that happening.

Terrifying footage of the plunging cart was posted from what seems to be Halloween Horror Nights at the Universal City theme park. It appears an employee lost control of the equipment as they were taking it down an escalator.

The food cart made a huge ruckus as it started tumbling down the stairs ... which might have alerted folks to duck and cover. Thankfully, it didn't end up making contact with anyone -- at least not in the video.

You can hear the person recording the video scream out, "What the f**k?!" Indeed, this could've taken an ugly turn fast -- especially because the park's been packed for Halloween Horror Nights.

The video does catch a glimpse of someone in a chef hat -- presumably a cook at the theme park -- who clearly realizes right away how bad this could've been.

Kanye West didn't hastily throw together "Jesus Is King" -- Kenny G says they recorded their collab for the album way back in February ... in a totally spontaneous and kinda romantic moment.

The legendary saxophonist came on "TMZ Live" Monday after his stirring performance at Kanye's Sunday Service in Los Angeles, and he told us their "Use This Gospel" track traces its roots back to Valentine's Day.

As you know, Kenny G joined Kanye to play "Use This Gospel" Sunday inside The Forum ... and Kenny says there was almost no rehearsal beforehand -- kinda like when he and Kanye recorded the song in the first place.

Kenny says their collab went down shortly after Valentine's Day, when Kanye invited him to the studio to listen to some of Yeezy's new music. Kenny says he told Kanye his sax would sound great on one particular track, so Ye whipped out a mic and started recording Kenny on the spot!

Remember ... Kanye hired Kenny to serenade Kim Kardashian West inside their living room on Valentine's Day ... and Kenny says the gig was the springboard for his "Jesus Is King" feature.

As for Sunday Service, Kenny gushes about the experience ... and he tells us why he went back onstage after his solo to whisper in Kanye's ear.

You'd think Billie Eilish would feel right at home within the hellish gates of Halloween Horror Nights at Universal Studios -- but she actually looked a little freaked out.

The teen pop star -- known for her spooky visuals and goth-esque tunes -- was out Sunday night at the L.A. theme park, enjoying some good-natured frights with her mom, her brother Finneas, his GF Claudia and 2 friends tagging along.

At one point, Billie was clinging to one of her pals as they strolled the grounds. Seems like BE was on edge, and looking for a human shield of sorts.

Luckily for her ... there are other Universal Studios attractions that are open during Horror Nights that can take your mind off all the ghouls jumping out at you.

Billie and the gang got on the famous water ride, and she rode in the front seat next to her ma, who came along for the ride as well -- and everyone got soaked.

Paulina Gretzky DEFINITELY brought it for Halloween ...

Wayne Gretzky's smokin' hot daughter channeled Gabrielle Union in "Bring It On" ... putting on the tiniest Clover cheerleader outfit for her costume this year -- and she KILLED IT!!!

The 30-year-old mother of two celebrated the holiday in epic fashion ... partying it up with her golf superstar husband, Dustin Johnson.

The couple appeared to have the spooky bash at their place -- with golf star Brooks Koepka and his model GF, Jena Sims, in attendance -- but all eyes were on Gretzky.

The Great One's daughter was dancing, hula-hoopin' and waving pom-poms ... and it was pretty great.

As for the rest of the party, Dustin made a good Jackie Moon and Jena Sims CRUSHED her 'Devil Wears Prada' fit!!!

By the way, Gabby Union didn't let Paulina get all the "Bring It On" shine over the weekend ... 'cause she went back to her old movie cheerleading days and rocked the famous Clover costume again!!!

Gabby obviously looked amazing ... but she added an adorable twist to the look -- dressing up her insanely cute daughter as a cheerleader as well!

Awwwwwwwwwwww!!!

Miley Cyrus and Cody Simpson grabbed an early-night bite -- and a kiss too -- before hitting up Universal Studios for some scares ... a pit stop that ended up costing Cody a bundle.

The singer was out Saturday night with her new Australian beau and a bunch of friends checking out this year's Halloween Horror Nights. But before they even got there, we're told the group of about 10 stopped off for some Mexican chow at Casa Vega in Sherman Oaks.

Sources who were present tell TMZ that when it came time to pay the bill, one of Miley's pals tried paying ... but we're told Cody sneakily slipped his card to the waiter instead.

All told ... our sources say the entire meal ended up running him about $1,000. Him paying might explain the smooch Miley planted on him before everyone headed out.

Not long after, Miley and the gang made their way to Universal City, where Miley rocked what appears to be a sexy cop costume, while CS opted for something a little more caj.

The whole posse posed for pics as they made their way around the park, hitting up different haunted mazes no doubt. Gotta say, Cody probably scored some major BF points that night.

Demi Lovato threw a crazy Halloween party Saturday night, and tons of celebs came out to celebrate.

The bash went down at Hyde nightclub in Hollywood. Among those who attended ... Paris Hilton, Larsa Pippen, Jason Derulo, Jake Paul, Madison Beer, Hana Cross, EJ Johnson, Jayde Nicole and Dorothy Wang.

Demi came as Pennywise from "It." Paris came as a schoolgirl. Larsa came in camo ... check out the gallery.

Kylie Jenner was supposed to attend, but her driver got in a little fender bender and she ended up being a no-show. She wasn't hurt and spent her night hanging with Sofia Richie. BTW ... Kylie was dressed as Madonna, circa 2003 VMA Awards.

Michael Jackson's imprint on Halloween culture is living on through his children -- one of whom's got an interesting tidbit about how his late father would celebrate ... incognito.

Prince Jackson hosted the third annual 'Thriller Night' at the Jackson family estate Friday night, which was all done in partnership with the charity Heal LA Foundation -- a nonprofit that emulates MJ's Heal the World org, but with a focus on those struggling in Los Angeles.

Tons of members of the Jackson clan rolled through, including Paris and Blanket (who goes by Bigi now), as well as Michael's nephews Taryll, TJ and Taj Jackson ... they all wore costumes.

While being interviewed outside the party, Prince shared a nice little nugget about life with their dad during the spooky holiday ... which, as it turns out, was one of the only times MJ could get out in public with his family without so much hoopla and attention.

PJ says because it's acceptable to be in costume for Halloween, MJ would take advantage and go trick-or-treating with the kids. Sounds like those outings were successful to a certain extent. MJ's nephews say there was always a tell that'd give him away. Any guesses???

As for what went down inside the actual party, it seemed pretty family-friendly ... with what appeared to be a haunted maze built in, and a 'Thriller' tribute show put on by dancers.

Of course, Michael's signature song has become a Halloween staple -- and tons of people still jam out to it and even rock his look from the music vid to this day. Again, a classic.

Halloween has officially hit Hollywood -- with massive parties to kick-off the holiday -- including star-studded events held by Paris Hilton and Dan Bilzerian.

Paris' party was held at a massive estate in Beverly Hills ... guests included Heidi Klum and her hubby, Kelly Osbourne, Paris Jackson and Ryan Phillippe. Paris was decked out in a super-hero worthy costume.

Bilzerian held his bash at a mansion in Bel Air with celeb buddies Diplo and Jason Derulo in attendance. The party even featured a neon haunted house for brave guests to walk through.

Eniko Hart hit up a pumpkin patch with her son, Kenzo ... and it's clear her husband, Kevin, is still a bit worse for wear.

The comedian was nowhere in sight Saturday as his wife and 1-year-old went pumpkin picking in Moorpark, but it looks like Eniko had everything under control ... grinning from ear to ear with her little tyke. The kid seemed to be in good spirits too.

As we reported ... Kevin's still recovering from a nasty car wreck he was involved in last month, which left him with 3 spinal fractures and required back surgery.

He's easing back to full health now -- even committing to promotional work he's gotta do for the new 'Jumanji' -- but obviously ... the guy's nowhere near 100% yet.