Hot Vegas

Ass. Ass. Ass. Ass. Ass.

That seemed to be the theme at Dennis Rodman's birthday party blowout this weekend ... and TMZ Sports has all the thong'd out footage.

It all went down at Sapphire gentlemen's club in Vegas -- where The Worm was constantly flanked by a team of talented twerkaholic strippers.

But it wasn't just about lap dances ... Dennis also mingled with fans, signed autographs and took pics with anyone who asked.

Nobody was feeling Jay Z's after party in Las Vegas the way he was -- and that's a good thing ... 'cause from the looks of It Jay just wanted to be somewhere else.

Jay Z hosted, undoubtedly, the most exclusive Mayweather-Pacquiao bash at Marquee Nightclub Saturday night ... VIP tables went for $50k.

He and Beyoncé held court at their own table right on the dance floor -- but while the DJ was trying to get the crowd going, Jigga seemed to be dreaming ... of laying his head on his pillow.

Justin Bieber was amped up at Rehab in Vegas before the fight ... singing to Big Sean -- which is surprising -- and making his feelings about Manny Pacquiao clear.

Justin partied with the crowd before walking out with Floyd Mayweather, and at 33 seconds you can see him mouth the words, "f*** Pacquiao" ... he then flips the bird.

It's also interesting he's felling Big Sean, whose breaking with Ariana Grande did not go well. You'll recall he just gave her a squeeze from behind a few weeks back, which set Sean off. We're told Sean doesn't have hard feelings for Biebs ... he thinks Ariana just used him.

8:20 AM PT -- Jake's rep tells TMZ the actor was not passing judgment on Jamie's performance, saying, he and Antoine "were laughing at something completely unrelated to Jamie's performance."

Jake Gyllenhaal was not impressed by Jamie Foxx's soulful rendition of the National Anthem, but at least he got in a few laughs.

Jake was sitting ringside with his "Southpaw" director Antoine Fuqua when Jamie took the mic. No doubt Jamie struggled ... he took his earpiece out immediately which is a sign of technical trouble.

Jake and Anton yukked it up and Jake checked his texts, then briefly sung along.

In case you wondered if the Mayweather/Pacquiao fight was a rich people's event, check out the aerial view of the private jets at McCarran International Airport in Vegas.

The pic was snapped Saturday and it makes it very clear ... you won't see many 7-figure figures sitting backwards on Southwest on the ride back.

Floyd Mayweather may have hugged Manny Pacquiao after the fight, but all is not forgiven with Floyd's fierce grandma.

Bernice Mayweather was leaving the MGM Grand in Vegas after the fight when to told our photog ... there can be no post-fight friendship until Manny takes back all his trash talk against the champ.

MOST BALLER DAY EVER!!!!!!!

Rob Gronkowski -- along with some of his New England Patriots teammates -- just hopped on a private jet after watching the Kentucky Derby ... and are now headed to Vegas for the fight!!

BALLER!!!!!!

The Derby was a major team outing -- even Tom Brady made the trip out to Louisville -- but it looks like the QB tapped out when Gronk and Julian Edelman and Danny Amendola decided to charter a jet to Sin City.

It's good to be rich.

11:45 AM PT -- Michelle just tweeted -- "After hearing my credential was pulled, I went home. Told this morning that HBO was able to get it re-approved late last night. That's it. All she wrote. I will now concentrate on Game 7. #GoSpursGo"

10:53 AM PT --Floyd's camp says the reporters are ALL WRONG -- claiming they were NEVER blocked from attending the fight.

Floyd's rep Kelly Swanson just went to Twitter and said, "No one including ME banned [Rachel Nichols] from covering the fight. She is already credentialed. #Facts"

"And [Michelle Beadle] isn't even on the pres list. She's credentialed through [HBO Boxing]. Yes credentialed. #Fact#2"

Swanson says both reporters still have their credentials.

ESPN reporter Michelle Beadle says she has been blocked from attending tonight's Mayweather v. Pacquiao fight ... and claims it's all because she ruffled some feathers in Mayweather's camp.

Floyd's camp hasn't explained why Beadle is blocked -- but it seems it has to do with the fact Michelle has been critical of Floyd and his history with domestic violence.

CNN reporter Rachel Nichols says she has also been blocked from the fight -- Nichols has suggested the ban has to do with the fact she pressed Mayweather on his violent past during an interview back in September.

We're reaching out to Mayweather's camp for an explanation, stay tuned.

It was supposed to be the hottest ticket of the year ... but it's gone cold ... and now multiple investors who tried to flip tickets to Mayweather vs. Pacquiao tell TMZ Sports they're losing BIG MONEY.

As we previously reported, ringside seats hit the market for upwards of $80,000 ... and face value of the crappy seats originally went on sale for $1,500.

A bunch of high profile ticket brokers and investors bought up as many tickets as they could get -- thinking it was a sure bet ... since interest in the fight has been through the roof.

But it just ain't panning out -- with one broker blaming the high prices and the fact that tickets only went on sale 10 days before the fight -- and investors are losing their asses.

One company told us they initially bought 80 tickets ... but only moved 20 ... and now they're holding the bag on 60 high-priced stubs.

"It's an embarrassment. We lost a significant amount of money," one broker tells us.

Same story for another ticket broker -- who tells us things have gotten "desperate" and they're slashing prices like crazy.

Diddy wants to leave the fighting to the professionals this weekend in Las Vegas, so he's taking extra precautions to make sure he doesn't get into any trouble during his Mayweather/Pacquiao party.

The rap mogul is once again hosting a huge after-party for the fight at the Havana Room & Beach Club at the Tropicana -- but Diddy wants this fiesta to go smoother than his Super Bowl event ... where he got into a fight with a pissed off fan.

According to our sources, here's Diddy game plan:

-- his VIP section will be far away from normies (unlike SB weekend)
-- 20 extra security guards to watch over his VIP section
-- guards instructed to immediately toss anyone heckling Diddy

Mo money, less problems ... that's the goal, anyway.

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.