Hot Vegas

Mally Mall is a little slow on the uptake ... he's giving Justin Bieber yet another animal he can abandon.

The famed producer was leaving Supperclub in Hollywood Friday night when our photog asked if JB will be the beneficiary of yet another animal in Mall's exotic menagerie. Mally was vague ... he'll be giving Justin a "feline" in Vegas Sunday for his never-ending birthday, but the feline family is large.

You'll recall ... Mally Mall gave Justin a monkey 2 years ago. Justin abandoned the monkey at a German animal shelter.

And who can forget the cute lil hamster Justin pawned off on a fan. The critter died a week later.

It'd be a lot smarter just to get Bieber 2 tickets to "Cats."

Paris Hilton showed surprising emotion in Vegas when she fake orgasmed in front of hundreds of people.

There was moaning, but no complaining, when Paris hit the stage at the "Thunder From Down Under" show during the bachelorette party of her cousin, Brooke Wiederhorn.

The boys onstage called the girls up to show their stuff in the orgasm department, and Paris won hands down.

The Hilton led group also made stops at Beacher’s Madhouse in the MGM and Britney Spears’ “Piece of Me” to show her what she'll be missing once she ties the knot.

But seriously, her orgasm was really good.

Richard Sherman is great for business ... 'cause the Vegas street violinist who put on an impromptu show for the Seahawks cornerback tells us he's been getting huge business offers thanks to the NFL star.

As we previously reported ... Sherman was so impressed with the violinist's skills ... he posted a video on Instagram ... where his 1.1 million followers could check it out.

Tony B. -- the 23-year-old street musician -- tells TMZ Sports he didn't get rich from Sherman's tip (though R.S. and Pats CB Brandon Browner gave him $25-a-piece) ... but says the encounter was worth much more.

"I've already got a few bookings," Tony tells us, "I got people inviting me to come play for them at weddings, tropical islands ... it's been crazy."

The best offer so far?

Seattle Seahawks superstar Richard Sherman was stopped dead in his tracks in Vegas this week ... all thanks to a crazy talented street violinist in Vegas.

Sherman and ex-teammate Brandon Browner were strollin' down the Vegas strip when they came across Tony B ... a 23-year-old pro violinist who was jammin' out in the middle of the day to make some extra cash.

The NFL stars were so impressed, they stopped and hung out for a while ... with Sherman even recording some of the sidewalk show to share on Instagram.

Vegas baby.

If Will Smith, Leonardo DiCaprio or Rihanna want FREE seats to the Manny Pacquiao-Floyd Mayweather fight -- it'll be no problem at all -- as long as they're down to be a walking billboard.

Tickets are in such high demand, fight promoters aren't handing out comped front row seats to high profile stars like they usually do. Instead, they'll be forced to pay up to $100k or more ... just like normies.

But we've learned there's another option. If a celeb is willing to endorse companies by wearing logo-emblazoned gear at the fight -- that company will eat the ticket cost.

For instance, we're told VOCO Vodka & Coconut Water has already made such offers to Leo, RiRi, and Big Willie ... in exchange for front row seats.

We know what you're thinking, but sorry ... you in a VOCO cap just ain't the same as Rihanna in one.

Enjoy the PPV.

There's a couple of banging bandits on the loose in Vegas -- after they got busted celebrating "Fifty Shades of Grey" all over a Sin City museum ... which may seem appropriate, but it's still illegal.

TMZ obtained surveillance video of their bare-assed exploits around the Erotic Heritage Museum -- which was featuring an homage to kink on Valentine's Day ... and after-hours the couple went on a room-by-room sex spree.

First, they found a hiding spot and waited for the museum staff to clear out ... and the house lights to go down. Then the banging began in earnest. The couple didn't hold back as they moved around -- but they didn't realize security was watching.

Dr. Victoria, who heads up the museum, tells us security alerted staff members who returned to bust the exhibitionists. You gotta see their half-naked getaway once they realized the jig was up.

The Rob Gronkowski party trains rolls on ... there were hot chicks (a lot of them), bottles of champagne, a Lombardi Trophy shaped cake ... and TMZ Sports has the EPIC party video.

The Patriots superstar hit up Surrender Nightclub at the Encore hotel in Vegas last night ... and did what Gronk does -- got super turnt up and smashed stuff!!!

Sources at the club tell us Gronk arrived around 1AM ... pounded champagne straight from the bottle, danced on stage, and showered the crowded with bubbly.

Best part ... Gronk SPIKING the football cake ... on his brothers head!

Check out the video.

"Pawn Stars" co-star Austin "Chumlee" Russell will DJ your club ... but only if you provide him with Girl Scout cookies and hot chicks.

The aspiring DJ is ready to scratch out his first gig Saturday at Ghostbar Dayclub's season finale at the Palms in Vegas ... his contract rider demands more pampering than Eddie Van Halen. Por ejemplo:

-- 1 pair of Hawaiian Nike Dunk SB's

-- Dinner at the N9NE Steakhouse for his crew

-- A basketball suite for a pick-up game after the show

-- Beautiful waitresses to escort him to the stage

-- Girl Scout cookies (Thin Mints and Peanut Butter Patties)

-- 2 Nerf basketball hoops and 5 Nerf guns

Rob Gronkowski ain't the only guy on the Patriots who loves to party -- Super Bowl hero Malcolm Butler hit the club scene hard in Vegas last night ... and TMZ Sports has the pics!

Butler was the guest of honor at Chateau nightclub in the Paris Las Vegas -- where the 24-year-old got his own booth, his own custom champagne ... and his own personal cheerleaders.

Multiple sources tell us Butler was super nice to everyone -- taking pics with fans and dancing all night long.

It's been a pretty good month for Butler -- as we previously reported, Chevy decided to give him a FREE TRUCK for making that game-saving interception in the Super Bowl.

Porn star Christy Mack is taking her talents to Vegas for the AVN Awards -- but after recovering from a brutal domestic violence attack ... she's doing it for a charitable cause.

TMZ has learned Mack will be doing a meet and greet at OG Las Vegas on Friday night -- and a portion of the door proceeds will be donated to Safe Nest -- a domestic violence org.

Christy's appearance kicks off AVN weekend in Vegas ... and we're told there will be VIP gift bags with limited edition Christy Mack merchandise on sale to fans. Some of that revenue will also go to Safe Nest.

TMZ broke the story ... Mack was allegedly pummeled by her ex-boyfriend War Machine back in August ... leaving her with broken bones and a ruptured liver.

War Machine is still behind bars facing 32 charges ... including attempted murder.

Now we know how he can afford that Million Dollar Piano … TMZ has learned Elton John has bumped Britney Spears in her Vegas run by hauling in more than $500K a show.

Elton’s definitely in the driver's seat. According to his deal he gets 88% of the door for every show. He also has a sign off on ticket prices, which range from $55 to $1,000 for VIP seats.

Captain Fantastic is putting Britney's $475K take a show to shame, because he's doing it with fewer seats -- The Colosseum only seats 4,296 while Britney's show at Planet Hollywood has 4,600.

The show began Friday and runs through April 14.

We reached out to Elton, but he's too rich to comment.

Dance duo Les Twins -- featured on Beyonce/Jay Z's recent tour -- were embroiled in an intense dance battle Friday ... it got so heated one of them got punched in the face!

The twins were competing at Revolution Lounge in Las Vegas ... and the person who shot the video says Laurent and Larry Bourgeios were trash talking with the opposing dancers.

Laurent eventually tries to make peace, but when he extends his hand he's swiftly gets punched in the face.

We're told the man who threw punches was booted ... and the competition ended with no winner.

Calls to the Mirage and Les Twins went unreturned.

Check out the dancers in action during the "On the Run" tour -- pretty impressive.

Mariah Carey is setting up shop at Caesars Palace, and you gotta figure she's pulling in at least as much dough as Britney Spears to do it -- which means an epic shopping spree is in the making.

Much like winter on "Game of Thrones" ... Mimi is coming, Las Vegas! You've been warned.

Robert De Niro has beef with Caesars Palace ... actually he has Kobe beef, because his swanky Nobu restaurant has been stiffed by the house.

De Niro is the co-founder of the high-end restaurant chain and his company, Nobu Hospitality, is listed as a creditor in the bankruptcy case the hotel just filed. According to legal docs -- obtained by TMZ -- Caesars owes Nobu nearly $460K.

And the actor's not alone. According to the docs, Caesars owes Gordon Ramsay $307K. Ramsay also has a restaurant -- Gordon Ramsay Pub & Grill -- in the hotel complex.

Move over Britney Spears, it's Mariah Carey, Bitch! The singer has officially signed on as the newest resident diva in Las Vegas ... TMZ has learned.

Caesars Palace got their wish ... we're told that Mariah snuck into Vegas last week to seal the deal. Need proof? We've got video of Carey and her entourage leaving the Palace Cheesecake Factory, escorted by security.

The superstar plans to light up the Colosseum in place of Celine Dion -- who's taking a break -- the glittery one will take the reigns until she returns late this year or early 2016.

We're told the deal is super secret but ENORMOUS. To put it in perspective Britney is raking in $475K a show ... it's unfathomable Mariah accepted less. Caesars is ready to announce concert dates any day now.

Looks like she can have her cheesecake AND eat it too.

Get ready for what could be the most epic girl's night out ever ... because Mariah Carey wants to party with Britney Spears.

Paps went bats**t crazy for Mimi as she left Craig's in West Hollywood ... just hours after we reported Mariah's deal to set up a residency at Caesars in Las Vegas was official.

While one might think Sin City is not big enough for both Mariah and Britney, Miss Carey told our photog she's totally down for a night on the town with Brit.

The Vegas gay bars will be hopping that night.