Hot Vegas

The UFC mixed business with pleasure in Vegas yesterday -- when the hottest ring girls and the toughest fighters stripped down to their bathing suits for a Sin City pool party ... and TMZ Sports has the pics.

It all went down at the Liquid Pool Party at the Aria to hype up UFC 189 -- where ring girls like Arianny Celeste, Brittney Palmer and Chrissy Blair kicked it with fighters like Luke Rockhold and Rumble Johnson.

Don't worry ... undefeated bad ass Paige VanZant was there too.

Scott Disick is saying NO to partying his face off -- for at least one night -- he's backed out of a paid hosting gig in Las Vegas.

Disick just made the 11th hour decision to postpone his Friday night appearance at 1Oak Nightclub in Vegas.

The decision comes on the heels of Kourtney Kardashian pulling the plug on their relationship -- and after Scott missed their 3-year-old daughter Penelope's birthday this week.

We broke the story ... Disick's friends had been urging him to cancel on 1Oak, and get into rehab.

Mariah Carey finally got billionaire James Packer on her turf -- Las Vegas -- just in time for the couple's first 4th of July together.

They shut down the rooftop deck of the swanky Mirage Villas for a Saturday evening celebration. We're told James dropped THOUSANDS to rent out the whole joint for Mariah, her managers, and Brett Ratner. This is the first time they've been together back in the States since Packer started courting Mimi during their Mediterranean tour aboard his mega yacht.

On the flip side ... Nick Cannon shared a meme addressing his single status captioned "I'm dating me."

To each his own ...

The woman who twerked with Klay Thompson in Vegas this weekend was involved in an airplane crash landing on her way back to Texas -- and moments after Klay found out, he reached out to see if she was okay.

The woman in the pool is Yara F. -- who spent the entire weekend partying with Klay and the Golden State Warriors during their victory celebration in Sin City.

After the weekend was over, Yara and some friends took a small plane headed back home to Texas -- but the jet experienced problems after take off ... and they crash landed at Lake Mead.

We spoke with Yara who tells us Klay reached out to see how she was doing after the incident -- and told her he was praying for her and the other passengers.

As for the crash, it's still under investigation -- but the good news ... no one was seriously hurt.

Bryan Cranston didn't just show up to the Electric Daisy Carnival in Las Vegas this weekend ... he brought Walter White along for the ride.

Cranston crashed the EDM festival and introduced the band Above & Beyond ... who just happened to have a song called "Walter White."

The "Breaking Bad" star growled out a few lines before ferociously dancing onstage with the group ... which he mildly regretted the next day. He wrote, "Leaving EDC—Vegas right now. Pulled an all-nighter. Old, my ass...Old, my head. Old, my feet...Happy Father's Day!"

Ruby Rose, meet ... Ruby Rose, or maybe it's Justin Bieber. Everyone has wanted to see this pic, to either end or fuel speculation that they may be the same person.

The two met up at Encore Beach Club in Las Vegas ... Ruby posted it on instagram.

Lamar Odom is turning to some famous boxers for support in the wake of the death of his close friend Jamie Sangouthai ... hanging with Adrian Broner and Zab Judah at an event in Vegas.

Odom had briefly returned to L.A. after he learned Jamie died -- and as we reported, he was taking the death very hard and friends were concerned that he would relapse.

But Odom is now back in Vegas ... and today, he was supporting Broner as the boxer weighed in for his big fight against Shawn Porter tomorrow night.

We're told Lamar has been friends with Zab for years (they're both from NY) and made plans to hang out this week while supporting Broner.

Odom appeared to be in a good mood at the event, smiling and talking to people.

Business tycoon Kirk Kerkorian -- the billionaire behind Las Vegas casinos, Hollywood's MGM Studio, and Chrysler ... has died at the age of 98.

Kerkorian died in Los Angeles on Monday after a brief illness.

He's most famous for making Vegas what it is today -- as the founder of MGM Resorts his company went on to purchase more than half of the rooms on the Strip by swallowing up competitors like Mirage Resorts and Mandalay Resorts.

A major notch in his belt -- he's responsible for luring Elvis Presley and Barbra Streisand to perform in Vegas.

Kerkorian bought and sold MGM Studios multiple times. He made major bank off his purchase of the James Bond franchise, and merging United Artists with MGM.

He's also famous for his 2001 divorce from his wife of one month, Lisa Bonder. She wanted $320,000 a month in alimony and child support. He eventually paid her $10 million plus $100k/month in child support ... even though he turned out to not be the father!

Channing Tatum gets paid millions to get down and dirty, but Thursday night in Vegas, he did it off a dare.

An ultra-hyper Caesars Palace MC goaded the "Magic Mike" star into bumping and grinding at the racy variety show, "Absinthe." After taking crap over some of his film flops, C.T. jumped up and busted a move.

Channing’s a big fan of the show, which combines cabaret and acrobatics.

This is gonna break Screech's heart -- but Lark Voorhies snuck off to Las Vegas and tied the knot with a guy she hasn't known all that long.

TMZ has learned the "Saved by the Bell" actress married Jimmy Green, a music engineer she met on Facebook about a year ago. Green says he and Lisa Turtle have already had 2 weddings, and they're not done yet.

He says they had a commitment ceremony on April 1, and then a Vegas chapel ceremony (complete with marriage license) on April 30. They're also planning a big wedding next year with friends and family.

Karrueche Tran got hot as fish grease Saturday night when we asked if she was allowed to still mug with men.

Karrueche was leaving 1OAK in West Hollywood when she bristled at the notion that Chris Brown scared her away from posting pics of herself with other guys. You'll recall, Brown threatened Tyson Beckford a week ago after she posted a pic of the 2 of them in Vegas. Chris later apologized.

Get this ... last night Chris and Tyson showed up at the same place -- the iHeartRadio Summer Pool Party in Vegas. Unclear if they interacted, but no one left bloodied.

Speaking of blood, we joked with Karrueche about the fake blood on her lip ... it's all for a movie.

Khloe Kardashain was a real trap queen ... and at least one guy was more than happy to fall into the trap when she put her best assets backward in Las Vegas.

The most recent KK sis to go platinum was at 1 OAK nightclub when a guy -- who seems to be a friend with major benefits -- danced up and invited Khloe to get closer.

Let's just say Khloe, and her ass, are loving the single life.

UFC champ Chris Weidman mixed fun with mixed martial arts this weekend, mugging with Floyd Mayweather at a Vegas pool after his title victory.

Chris didn't look the worse for wear after his 1st round submission against Victor Belfort at UFC 187. The sunglasses are pretty big and could be hiding a bruise or 2, but Weidman took care of business pretty quickly so probably not.

The 2 champs chilled at the pool at The Palms, where Weidman was hosting a post-fight event.

Chris Brown will be allowed back in the Vegas hotel where he brawled during a basketball game ... but there are serious strings attached.

Brown wants to spend part of the Memorial Day weekend at The Palms, but the hotel has reservations.

You'll recall during the Mayweather/Pacquaio fight weekend Chris had a ridiculous suite at The Palms, which had its own basketball court and at around 3 AM he allegedly attacked an opponent. Police investigated but no charges were filed.

The Palms management is agreeable to allowing Chris back, but now there are rules. For starters, he is not allowed to throw parties in the suite without pre-approval from hotel honchos. The rule doesn't apply if he has fewer than 15 guests.

But there's more. No outside food or alcohol, which sounds more than a money-maker for the hotel than a real rule.

Chris will be tested, because Karrueche is booked at the same hotel Saturday night, and this will be the first time they've seen each other since their breakup.

Wiz Khalifa just wanted to get turnt up in Vegas for this Memorial Day weekend but there's a big wrinkle ... baby mama Amber Rose.

We’re told Wiz just found out his estranged wife has booked a suite at the Palms Casino Resort, the same place he's staying. He's contacted the hotel and insisted that he's not on her floor. Wiz has made it clear ... he does not want Amber in his line of sight during the long weekend.

It's gonna be complicated, because Amber's hosting a pool party the same day Wiz debuts at club Rain as DJ Daddy Kat.

Here's what's apparent ... bad blood in Vegas won't stay in Vegas.

Britney Spears made Tyson Beckford her bitch by strapping a leash to him and walking him up and down the stage for her audience to see ... and it looks like he loved it.

Brit reunited with her old "Toxic" music video co-star in Vegas during her Planet Hollywood show -- and there was a lot of leather, a lot of chains ... and a lot of Tyson on all fours.

After the "Freakshow" performance ... the Chippendale's headliner got more comfortable by stripping to cheers and screams in the crowd. Brit joined in too, but no stripping for her. No chains either.