Hot Vegas

Zac Efron did NOT go to rehab for alcohol abuse -- it was far more serious, because multiple sources tell TMZ he had a serious cocaine addiction.

Zac completed his stint in rehab earlier this year. We're told the problem spiraled out of control during the filming of Seth Rogen's movie "Neighbors," which was shot during a narrow time frame beginning in April.

Sources tell us Zac -- who also starred in the movie -- was a no-show on a number of days. As one source connected with the film tells us, "It was common knowledge he was struggling with cocaine."

Three other sources confirm ... Zac's problem was rooted in cocaine, but say he also dabbled in Molly -- a pure form of Ecstasy, and a popular drug in clubs and raves.

We're told ... early this year, Zac and some friends went on a coke rager in a room at the SkyLofts at the MGM Grand in Vegas ... and caused around $50k in damage. No word on who took care of the bill.

We contacted Zac's rep ... she said, "Don't think we'll be making a comment."

Everything about Britney Spears' pre-dawn dog and pony show to announce her Las Vegas shows was absolutely perfect!

If you consider air sickness from a hellish helicopter ride ... perfect. And who doesn't?

Britney Spears got off to a shaky start for her Las Vegas debut -- she got sick on the chopper ride for her big announcement.

Britney didn't say if "sick" meant hurled ... but it's a reasonable conclusion. She wore gigantic sunglasses in the dark night as "GMA's" Sam Champion tried to get her animated.

So here's the lowdown ... Brit opens Dec 27 at Planet Hollywood. TMZ broke the story ... she'll be pulling in nearly $15 mil for 48 concerts a year and it's a 2-year deal.

Ticket prices are pretty reasonable -- $59 - $179.

Now this is interesting ... Champion asked her about possibly living in Vegas and Brit was sketchy. Our sources (and obviously they're good) tell us ... Brit will "absolutely not" be living in Vegas. She has no plans to get a house there. "It's strictly in and out," said one source involved in the concert ... partly because she doesn't want to disrupt the kids during their school year.

We're told Planet Hollywood will make a gigantic suite available on the 52 floor. There are several of these mega-suites available on the 51 and 52 floors ... People at the hotel call it the 5152, which is interesting. Brit knows something about that ... minus 2.

Floyd Mayweather Jr.'s baby mama is LIVID -- telling TMZ, her 10-year-old daughter was dressed up like some gold-digging hoochie at the big fight on Saturday ... and it's all one designer's fault.

The designer in question is Project Runway's Michael Costello -- and Floyd's baby mama Josie Harris tells us, Costello was hired to design a very special dress for the boxer's 10-year-old daughter Jirah to wear at the Canelo fight in Vegas (left).

Josie says the dress came out great -- but when they showed up to the fight, she noticed Floyd's on-and-off-again side piece Shantel Jackson wearing the same exact dress (right).

According to Josie, she paid Costello $795 for a one-of-a-kind dress, and now she's pissed the guy gave a replica to none other than Floyd's girlfriend ... who also sat ringside.

Josie tells us, "It's an unspoken rule and a cardinal sin for a 'real designer' to dress clients alike going to the same major event ... Tacky, tacky, tacky."

And Josie didn't stop there, turning her anger toward Jackson as well ... adding, "She is a total gold digger ... She conveniently came back around 2 days before Floyd got his $41.5 million check."

As for the designer, Costello says he will NOT be giving anyone a refund -- telling us, "No exclusivity was promised regarding the dress. If you want exclusivity, you need to pay more." Costello says his people told Miss Jackson that Floyd's daughter would be wearing the same dress and she didn't care.

"Breaking Bad" star RJ Mitte isn't the least bit embarrassed that he celebrated his 21st bday in Vegas with his mom ... telling TMZ, "WE PARTIED HARD!!!!"

We broke the story ... Mitte -- who plays Walter White Jr. on the AMC show -- raged in Vegas with a bunch of hot chicks for his bday last month ... with his mom by his side.

But outside Cecconi's in West Hollywood this weekend, Mitte told us his mother's not just a huge party animal -- she also makes a SOLID wingman.

No one looks out for you like mom.

Britney Spears will spill the beans about her upcoming Vegas spectacular tomorrow, TMZ has learned -- and the announcement itself will be an extravaganza in the middle of nowhere.

We're told Britney will unveil plans for her big new Planet Hollywood show from an undisclosed location in the Mojave desert at around 4AM PT, and it will be broadcast live on "GMA."

It's going to be huge -- 1,350 participants will be bused from Vegas to the desert. And get this ... all attendees must be between 5' and 6' tall ... we don't know why.

As for Brit ... she'll be arriving via helicopter.

All told, we've learned the show announcing the show will cost roughly $100,000 -- including $27,176 to bus all the people (28 buses total), $4,200 for tents, and $5,154 for craft services ... which includes 2,100 bottles of water, coffee, 918 Gatorades, and 567 Red Bulls.

We're told Britney will be performing her new single "Work Bitch," and she'll then blast specifics about her new show that debuts in December. In case you can't wait, we have a bunch of particulars, including what she'll be raking in.

4 AM, huh. Bets on lip-synching anyone?

Call him Dennis Rodman, 'cause Liam Hemsworth was rebounding like a CHAMP in Vegas last night ... spittin' some serious game to a smokin' hot chick -- and from the looks of things, it worked.

Just one day before reps "officially" announced the demise of his engagement to Miley Cyrus, Liam and 5 of his friends hit up XS Nightclub ... where he ran into 23-year-old Eiza González.

FYI -- Eiza happens to be a singer/actress (seems like someone's got a type).

They drank ... he smoked ... they flirted ... they were thisclose ... and people in the club said they never left each other's side before leaving the joint together at 2 am.

Muy bien.

Britney Spears will be raking in HUGE STACKS in Vegas this winter -- a ridiculous $310,000 per show ... nearly $15 million per year -- but she still doesn't hold a candle to Celine Dion.

TMZ is privy to the financial details of Britney's deal. The 2-year contract calls for 48 shows a year at Planet Hollywood. According to the contract, Britney will earn $310,000 per show.

By contrast, Celine does 70 shows a year. Sources say she pulls in $476,000 a show ... so she's way ahead of Britney in the money department, but Brit gets more time off.

Britney's cut of the gate is huge -- projected sales per show are $508,514, meaning Brit will be snagging more than 60%.

As we reported, producers are shooting for a "cool, hip club-like show" ... unlike the run-of-the-mill Vegas shows that preceded it (Celine's included). It starts in December.

If that's not convincing, check out these cool 3D mock-ups of the stage.

Guitar legend Carlos Santana slammed into a parked car in a fancy Las Vegas neighborhood Friday night ... but cops say he wasn't driving drunk.

The 66-year-old was in Vegas for a couple of shows -- but he didn't have a performance on Friday night.

A spokesman for the Las Vegas Metro Police Department says no one was injured in the wreck -- noting there was no one inside the parked car at the time of the collision.

As for the make and model of Santana's ride -- so far, that's unclear ... but we're workin' on it.

A police rep told the Las Vegas Review Journal ... "He hit a parked car, it was a minor accident, is all" ... adding the incident wasn't even "log worthy."

Justin Bieber just high tailed it to Las Vegas with his crew to walk Floyd Mayweather into the ring tonight ... and they're clearly expecting "Money" to kick ass.

Justin boarded with Lil Twist, Lil Za and a few others Saturday for Floyd's fight against Saul "Canello" Alvarez -- and most of his entourage were proudly sporting Mayweather's Money Team shirts.

Worth noting ... no visible puffs of smoke as they boarded the plane ... this time.

8:20 PM PT -- Bieber is officially backstage with the champ.

Justin Bieber has successfully weaseled his way into Floyd Mayweather's inner circle -- AGAIN -- TMZ has learned, the 19-year-old will walk Money May to the ring tomorrow before his next big boxing match in Vegas.

Bieber has been ingratiating himself with Mayweather since last year, when the singer appeared out of nowhere at Mayweather's match against Miguel Cotto ... walking the fighter to the ring, and celebrating with him afterwards (along with Lil Wayne).

The courtship continued ... and this summer, Mayweather flew Bieber out to his 13-year-old daughter's birthday party.

Now, Bieber's back for more shameless money-flaunting publicity whoring ... agreeing to accompany Mayweather to the ring Saturday at the MGM Grand, where May's set to fight Saúl "Canelo" Alvarez.

And he deserves to get his ass kicked. (We may or may not be talking about Alvarez.)

Wanna live like Wayne Newton?

First, get about 45 face lifts (allegedly) … then, PLACE AN OFFER ON HIS FAMOUS LAS VEGAS ESTATE … but only if you’ve got around $70 million laying around.

The 36-acre ranch – which Newton famously dubbed Casa de Shenandoah – has hit the market … just months after Wayne and his wife moved out following years of legal battles over money (or lack thereof).

CdS has it all -- plush white carpets, gold trimmed doors, a "car museum," 37 empty stables, lots of rundown buildings, an old ass tennis court, a dilapidated gazebo and a jumbo jet and terminal.

Of course, the property was the scene of Wayne’s infamous date with Ellen Griswold in “Vegas Vacation” … remember, she was a Wayne-iac?!

Anyway, the developer who bought the property in 2010 originally planned to turn the ranch into a Wayne Newton museum. Those plans have been scrapped. Now, he just wants to unload quick … for quick $70 mil.

Fun Fact -- the owner did dump millions into upgrading the property ... including an “upgrade” of removing 7,000 cubic yards of horse manure from the grounds.

What did Spencer Pratt do for his 30th birthday? He watched his plastic girlfriend Heidi Montag jump out of a plastic cake at a strip club in Vegas. Woooo adulthood.

Spencer, looking a little fuller these days, celebrated the day of his birth inside the VIP section of famous strip club gentleman's club Crazy Horse III on Saturday along with Heidi and friends.

In the pics Heidi goes all Marilyn Monroe on a giant fake cake. Spencer looks pretty happy about it.

"Breaking Bad" star RJ Mitte turned 21 in true Vegas style -- partying with booze, scantily clad women ... and his mom (not at all scantily). So, why party with Mom?

Here's the best explanation from our newsroom -- and by best, we mean ... worst.

“Breaking Bad” star RJ Mitte rang in his 21st birthday by RAGING in Vegas -- with tons of hot chicks, tons of hard booze ... and his mother???

Mitte -- who plays Walter White Jr. on the AMC show -- hit up Ghostbar at the Palms Casino Resort this weekend ... where he partied hard with his BB co-star Daniel Moncada, “True Blood” actress Lindsey Haun and Amanda Fuller from “Last Man Standing."

... and his mom was there, too!

But parental supervision didn't keep Mitte from enjoying all that Vegas had to offer -- we're told the actor downed some Jack Daniel’s Tennessee Honey cocktails while cake fighting with some babes.

Hopefully RJ's night of boozing ended better than that time WW2 got drunk ...

Kevin Federline didn't just get married this weekend ... he got DOWN ... freak dancing with his brand new wife Victoria Prince at their Vegas wedding, and we got the pics.

As we reported, 35-year-old Federline and girlfriend Victoria Prince got hitched Saturday night at the Hard Rock in Vegas, and they really pulled out all the stops. Kevin was acting like Kevin (a total goofball) and Victoria couldn't stop flashing her new bling. Side note: Victoria looked hot.

FYI, Kev and Vic have been dating since 2008 and already have one daughter, Jordan Kay, who was present for the ceremony.

The wedding looked beautiful, but it still didn't hold a candle to Kevin and Brit's 2004 wedding, which reportedly cost $1.8 MILLION. Not that it's about the money, or anything.