Hot Vegas

"Transformers" director Michael Bay says his epic meltdown in Vegas yesterday might not make him popular with technology nerds ... but also says it hasn't exactly hurt him with the ladies.

Bay was on "TMZ Live" explaining why he freaked out and walked off stage during a big presentation at the CES convention.

It's not like he's never been on stage ... he says he's been front and center hundreds of times, but explains why this one was different.

Britney Spears is into 2 things -- her BF and B&D .. and she got to enjoy both at the same time during her Vegas New Year's Eve concert.

Brit dragged David Lucado on stage at Planet Hollywood ... forcing him down on hands and knees, strapping him into a harness and dog collar and then parading him around on a leash.

David seemed to enjoy it enough ... it's one of the fun perks of being with Britney.

Hours after retaining his championship belt and possibly ending Anderson Silva's career ... UFC Middleweight champ Chris Weidman continued his campaign of destruction -- by decimating a double bacon cheeseburger.

Weidman partied at Surrender nightclub -- washing down his burger with a cold Miller Lite.

UFC's other big winner Ronda Rousey also feasted in celebration ... she went with family and friends to Wolfgang Puck's restaurant at the MGM for her usual post fight chicken wings.

America!

Britney Spears blew everyone away during her Vegas debut last night ... everyone, but Katy Perry.

Katy was front and center for the "Piece of Me" show -- rubbing elbows with Miley Cyrus and Adam Lambert -- and while Miley danced her ass off, Katy couldn't seem less interested.

True enough ... Britney's no John Mayer, but come on Katy -- she's a much better dancer than him.

As they say ... you can please some of the people all of the time ...

Britney Spears got the lead out for tonight's big Las Vegas debut.

Brit's friends and family were there for her final dress rehearsal for the "Piece of Me" show ... and she did not disappoint.

Britney is back to her old self onstage ... her dance routines blew everyone away. Her singing ....

Jay Z continued his 22-day quest to eat an entirely vegan diet yesterday in Vegas ... and then partied his face off while paying tribute to Beyonce's new surprise album.

Sources at Hakkasan restaurant tell us Jay dined on strictly vegan options after his concert ... while his friends -- including rapper/producer Timbaland -- ate crispy duck salad and roasted Chilean seabass.

Afterward Jay and his entourage hit up Hakkasan's nightclub (pictured above) ... and toasted champagne to honor his wife Beyonce's surprise album when the DJ played their new collab "Drunk in Love."

99 problems but a dish 'aint one.

Francesca Eastwood knows her wham-bam-thank-you-ma'am marriage was a huge mistake ... but she's not blaming her bad decision on alcohol ... 'cause she says she doesn't drink. Ever.

Francesca -- who's already made up her mind to annul her week-old marriage to Jordan Feldstein -- was leaving Mastro's after dinner with friends (sans hubby) when she tried to set the record straight.

Problem is ... we're not really buying what she's selling.

As we previously reported, multiple sources tell us there was a TON of drinking involved when the couple decided to head to a Vegas chapel and tie the knot last weekend.

Plus, would a sober person really swap "I dos" in front an Elvis impersonator???

Francesca Eastwood's marriage to Jonah Hill's brother will end faster than you can say Britney Spears and Jason Alexander ... because she's getting the week-long marriage annulled ... TMZ has learned.

Sources close to the regretful couple tell us ... the notion of getting hitched was fueled by alcohol -- and lots of it. Francesca and Jordan Feldstein ended up in a cheesy Vegas wedding chapel and took their vows amidst faux greatness -- an Elvis impersonator.

Francesca had immediate regrets. We shot her the day after the nuptials and she wasn't wearing a wedding ring.

We shot Clint Eastwood a few weeks ago asking for marriage advice and he told our photog to not rush into anything.

Guess Francesca should have listened.

Clint Eastwood's daughter got super bad in Vegas last week ... the reality star got hitched to Jonah Hill's brother ... TMZ has learned.

We got hold of the marriage license -- filed with the Clark County Recorder's Office -- showing Francesca Eastwood and Jordan Feldstein sealed the deal Sunday.

Our sources say vows were said at the Simple Wedding Chapel ... a quickie marriage spot that offers Elvis witnesses.

But the marriage is shrouded in mystery! Francesca was out in Hollywood Thursday night and she wasn't wearing a wedding ring. So was it a drunken escapade or the real deal? Only Elvis knows.

BTW ... Jordan isn't just some Jonah Hill hanger-on, he manages Adam Levine and Robin Thicke.

Olympic gold medalist and failed reality star Ryan Lochte still has tons of cash -- or maybe just sucks at math -- because he just dropped a 200% tip at an expensive Las Vegas steakhouse ... TMZ has learned.

Sources at Andiamo Italian Steakhouse in the D Casino & Hotel tell us, Lochte stopped by with a bunch of dudes Wednesday night and ran up a $314 tab -- on top of which Lochte added gratuity of $606, for a grand total of $920.

We're told Ryan -- whose reality show "What Would Ryan Lochte Do?" was canceled after one season -- asked all the waiters to split up the ridiculously generous tip evenly.

But we know ... you're still wondering why Lochte's pockets are so damn fat?

Our sources say he had just won big at the roulette table before dinner and was feeling pretty flush. Ain't no money like house money!

Chris Brown has become a Halloween nightmare for 2 big nightclubs that now have anger issues of their own ... because Brown has bailed on them.

Chris was booked to host a party at the Conga Room in L.A. tomorrow night, followed by another hosting gig Friday with GF Karrueche at Haze nightclub in Vegas.

We've learned both clubs just got word Chris will be a no-show. As TMZ first reported, the singer will stay put in a Malibu rehab joint for up to 3 months so he can deal with his anger issues.

But here's the thing. Even Karrueche bailed.

The show at Haze will go on. As for the Conga gig, the event has been cancelled.

Britney Spears is already picking up some Vegas hangers-on … ‘cause Mini-Britney is launching her own rival act on the Strip -- and TMZ has learned it’s opening the same night as big Brit's show.

Sin City sources tell us ... Mini-Brit, aka Elena Gant, is steppin’ up large ... kicking off a new show at Beacher’s Madhouse in the MGM Grand Hotel on Dec. 27th… the same night Spears opens at Planet Hollywood.

And 12" isn't the only discrepancy between the ladies (5'4" to 4'4") -- Britney is set to rake in about $310,000 per show … while mini-BS will make a slightly shorter stack of $310 per night.

Still undecided about which show to check out? If you order an expensive bottle of booze at Mini-Britney's gig … a little person flies out of a stuffed elephant’s BUTT to deliver it to you.

Stay classy, Vegas.

One day Pauly D will tell his daughter the heartwarming story about that time he had a drunken, condom-less one night stand in Las Vegas ... with her mom.

Ok, maybe not so heartwarming.

Hours before Pauly D knocked up Amanda Markert, they were both raging at a crazy pool party in Vegas ... and TMZ has several pics of the boozy scene right before the drunken conception.

The two met at the legendary Rehab pool party at the Hard Rock Hotel in the summer of 2012 ... Pauly was working the DJ booth and Amanda was partying her face off in a smokin' hot bikini.

At one point during the party, Amanda somehow got on stage (probably because she's hot) ... and sprayed down the crowd with a bottle of champagne. Later she was seen double-fisting novelty-sized cocktails.

Soon after that, she got some one-on-one time with Pauly -- and 9 months later she gave birth to his daughter. A true love story ...

But the connection they had in Vegas stayed in Vegas ... 'cause now Pauly and Amanda HATE each other's guts and are at war over custody and child support.

Vegas baby, VEGAS!!!

Pauly D got famous in New Jersey, but he wants to stay as far away from The Garden State as possible when it comes to deciding who gets custody of his kid.

According to legal docs -- obtained by TMZ -- Pauly and his baby mama, Amanda, are in a dogfight over which state should handle their custody case.

Pauly wants Nevada to handle it, but the former Hooters waitress wants a Jersey judge to pass judgment ... and we know why.

Nevada judges are more likely to give the father custodial rights than Jersey jurists. In Nevada, there's a presumption that both parents should get joint custody. There is no such presumption in Jersey. Now as we reported, Pauly wants FULL custody, but having joint custody as a fall back is better than nothing.

There's also an issue of convenience. Pauly lives in Vegas and he doesn't want to have to make the trek to Jersey every time there's a court hearing.

Here's what's ironic: If Pauly gets his way and the case is handled in Nevada and the judge awards joint custody, he'll probably end up paying MORE child support than if the case was handled in Jersey -- that's just the way the law works. But sources tell TMZ ... he knows he'll end up paying more child support but getting custody is way more important to him.

Pauly D's bloodline will live on, because he has a little girl crawling around -- near the Jersey Shore ... TMZ has learned.

Here's what we know ... The mother is 25, born in Jersey but she met Pauly in Vegas last year. We're told they hooked up while he was DJing in Sin City.

The baby is a few months old, living with her mom.

The mom has filed court docs in New Jersey to formally establish paternity, but we've learned Pauly has already taken a DNA test and he's the dad.

Pauly tells TMZ, "I'm proud I'm a father. I am excited to embark on this new part of my life."