Hot Vegas

The guys from "Pawn Stars" can spot a money making opportunity from a mile away -- which is why they believe a Mayweather LOSS would be HUGE for the city of Las Vegas in the long run.

Don't get it twisted ... Corey and Rick Harrison -- who were hangin' at the D Hotel -- told us they're rooting for the hometown guy, Floyd Mayweather ... but explain why Floyd taking the "L" would be MUCH BETTER for Sin City.

Boxing champ Adrien Broner was handcuffed and detained by cops in Las Vegas Thursday night, but not arrested ... and his people say it's all because an "a**hole security guard" didn't like the way he was dressed.

People in Adrien's camp tell TMZ Sports ... the 3-time world champ and 7 members of his posse went to Tao nightclub in the Venetian and plunked down $11k for a table. They say the host took the money and let them in, so they took the escalator up to the club and then things went south.

They say a security guard stopped them and said they had to leave because they weren't dressed properly, claiming their jeans and shoes were a deal breaker. Adrien got pissed and said it was hip-hop night and Fabolous was performing, so they were not only dressed appropriately but others were wearing the same thing.

The guard wasn't moved and ordered them to leave. Adrien refused so the guard called the cops.

Police came, cuffed Adrien and took him to a room. His people say police held the boxer for 20 minutes, let him go and then Adrien and his crew left the hotel.

Check out the video ... you hear Adrien say, "They're mad 'cause I'm rich" ... something that seems to be a theme when Broner meets cops.

Broner was arrested in Ohio back in January for DUI. The boxer humblebragged to the arresting officer he was "blessed" because he made more than $100 million in his career. He pled not guilty and the case is pending.

So far no comment from Tao.

Wanna bet if Justin Bieber will WEAR A HAT during his walkout with Floyd Mayweather??

Well, now you can ... because betting websites are seriously TAKING ACTION on the pop star in some crazy new prop bets for the fight..

We spoke with the people over at BetOnline.ag who tell us Bieber is a hot topic when it comes to prop bets ... which is why they're taking action on the guy. For example:

Will Bieber wear sunglasses during the walkout?
Yes -380 No +260.

Translation -- it's so likely he'll rock shades, you have to bet $380 to win $100.

There's more ...

Will 50 Cent walk out with Mayweather?
Yes +185 No -275

Jamie Foxx's National Anthem time
Over 94 seconds -120
Under 94 seconds -120

Filipino National Anthem time
Over 76 seconds -120
Under 76 seconds -120

It sounds ridiculous, but prop bets are HUGE during major sporting events!

Britney Spears hurt her ankle so badly during her Las Vegas show Wednesday night, she's been forced to cancel two shows.

Her shows for this coming Friday and Saturday will be rescheduled after doctors advised her not to perform ... opting instead to rest her injured ankle so it can heal.

So, now it looks like Britney has no plans on Saturday night ... or she will be front and center at the Floyd Mayweather/Manny Pacquiao fight, which just happens to be the same night ...

See ya there, y'all!!!

Britney Spears went down hard during her Las Vegas show -- falling so hard mid-song ... it was up in the air whether she'd stay down or go on with the show.

She did both -- staying down, and dancing from her backside.

Brit Brit rolled her left ankle pretty good, but managed to keep going through the end of "Crazy."

Her dancers eventually helped her to her feet, and she seemed to walk it off. The fall looks nasty, but Britney assured fans later ... she's ready to get back in the game.

50 Cent is jumping on the money train this weekend, where he plans to score huge bank off the backs of Floyd Mayweather and Manny Pacquiao.

Club sources tell TMZ ... the rapper is getting half-a-million bucks Friday night for throwing down rhymes at Drai's.

Fact is, 50 may be hedging his bets. You may recall ... he's put $1.6 mil on the line, betting Floyd Mayweather will put Manny Pacquiao in his place.

And we're told he also made a deal with Effen Vodka to make around $500k for a show 2 weeks later at Pool After Dark in Atlantic City.

When it rains it pours.

Mariah Carey is taking her Vegas residency as seriously as anything in her career ... so say the people getting her ready for next week's kickoff.

Our Mariah sources say she will not have a repeat of Japan ... her voice is "on fire." We got this pic of her rehearsing over the weekend with her musical director, producer and other show-related people.

There's lots of voice protection stuff in the picture ... throat coat, tea, etc.

As for preparation, one of her people says, "She's been singing these 18 #1 hits for a very long time."

Her show starts next Wednesday.

Floyd Mayweather vs. Manny Pacquiao is the main event but even the under, under ... UNDER card has some big names -- in the little boxing world, anyway.

"Mini Pretty Boy Money" and "Mini Pacman" went at it in the MGM Grand lobby on Monday ... not far from the full-size ring the resort is using to promote Saturday's huge bout.

You gotta see the stare down between the fighters -- absolutely menacing ... said no one.

But get this ... the ultra flyweights will really fight on Saturday night at Beacher's Madhouse and tickets ain't cheap. For $1500 you get to see Floyd and Manny on closed circuit, and then after that ... Mini Money and Mini Pac will go at it live.

Evander Holyfield finally has a date to the Mayweather vs. Pacquiao fight ... a mystery fan who just dropped $40,100 for one of the most V.I.P. boxing experiences EVER.

The "Real Deal" was part of an INSANE package featured in an eBay auction -- where the lucky winner gets:

-- One ticket to the fight ... sitting with Evander
-- 1st class airfare to and from Las Vegas
-- "Deluxe" room accommodations at the MGM Grand
-- A fancy steak dinner with Evander before the fight
-- One year of products from Quest Nutrition

There's more ... the proceeds from the auction benefit the CharityVision organization -- which helps visually challenged people in developing nations.

The package received 81 total bids -- and people who bid more than $25k had to pre-qualify with an independent agency.

Mariah Carey was welcomed Monday to Caesars Palace in Las Vegas with a quiet, understated gathering of a few close friends ... jkjk ... it was a giant, over-the-top spectacle!

Carey begins her residency at The Colosseum next week, and arrived Monday in a pink convertible, white fur stole, and nude bodysuit -- Mimi wasn't hiding a thing. In fact, she showed off all her #1s with a parade of 18 trucks -- one for each hit song.

Mariah spoke a little -- maybe she's saving her voice -- but mostly she let her anti-Nick Cannon anthem "Infinity" do the talking during her queen-like entrance.

If her Vegas shows are this well-produced, Mariah will be worth the price of admission.

It must have looked like someone left Sisqo in the dryer too long -- until the 90s R&B star made a surprise appearance to do a duet with his little doppelgänger at Beacher's Madhouse.

At first, just Mini Sisqo got the crowd jumpin' Saturday night in Las Vegas with "Thong Song" -- and then out of nowhere the real deal singer jumped on stage and took over mic duties. The little guy managed to hold his own though ... while rocking a throwback headband. #respect

Turns out Mini Sisqo is multi-talented ... he also does a mean Mini Kanye.

Jarret Stoll had been raging in Vegas with several of his L.A. Kings teammates in the hours before the NHL star was busted for trying to bring a BUNCH of cocaine and molly to a pool party ... TMZ Sports has learned.

Multiple sources confirm ... the Vegas vacation was essentially an unofficial end-of-the-season celebration to unwind and party as a team.

As far as how many Kings were part of the festivities -- sources tell us there were more than a dozen people from the organization on hand ... many of whom continued to party in Vegas throughout the weekend even AFTER Stoll was arrested.

We know Drew Doughty and Martin Jones were part of the Vegas crew -- but they were NOT arrested or accused of any wrongdoing whatsoever. In fact, the only person who got into any trouble was Stoll.

We reached out to the players and the Kings organization -- but no one wanted to comment on this specific story.

Kourtney Kardashian celebrated her 36 birthday Saturday night in Vegas with boyfriend Scott Disick ... and he looks less than enthused.

The bash was thrown at 1OAK. There was a pretty big crowd, sans all the other Kardashians. Kim's at home in L.A., Kylie's at Coachella with Tyga and Kendall.

Khloe was busy Saturday night throwing a shindig for her new group messaging app called Regroupd.

The sheets were still warm when Britney Spears slipped into her Las Vegas pad -- because she didn't even wait 24 hours for Elton John to move out before moving back into the uber swank suite.

Sources close to the singers tell TMZ ... Brit is going to be living it up in the 8,000 sq. ft. paradise known as the Palazzo Suite at Rio while she's in Vegas. Elton lived there during his most recent Caesars Palace stint ... but we're told he moved out Tuesday night, and Brit was in by Wednesday morning.

The two have been trading off at the suite for some time now and Elton lived there while Brit was on her most recent hiatus. Britney has called the pad home for the last 13 months.

The THREE floor suite comes with 24-hour butler service, 2 jacuzzis, an elevator, and furniture on loan from 17 museums around the world. Sir Elton has standards.

10:45 AM PT -- It now sounds like the guy who said "fat bitch" is so far back there's no way Britney could have heard him. So the question ... what happened that pissed her off so much? Several sources who work on the show tell TMZ, they believe Britney was reacting to a comment someone made in the audience, but they don't know what was said.

Check out the video closely. It looks like the music may have started late ... so that's a possible trigger as well. But no one is saying definitively.

Britney Spears stood up for herself Wednesday night during her show, when someone in the audience apparently called her a "fat bitch."

A guy standing next to the mic says "fat bitch", and you can clearly hear Britney say ... "f***ing asshole."

It's interesting on several levels. Critics of her show say she walks through her performance like a robot, but this clip clearly shows Britney's antennas are up.

Plus, her mic was on ... during a song!!!

And she doesn't take crap from random people. Are you listening Sam Lutfi?

He can DEFINITELY afford tickets, but Floyd Mayweather says he WON'T be hitting up Jay Z's post-fight mega-party in Vegas -- there's another place he's already committed to be.

TMZ Sports spoke with Money at his media day workout at his gym near the Las Vegas strip Tuesday night ... when we pointed out all of the post-fight party options ... Chris Brown, Nicki Minaj, Snoop, Jay, etc.

By the way, VIP packages for Jay's shindig are on sale for up to $50k!!! Insane, but a drop in the bucket for Floyd.