PINK VS. CHRIS BROWN VS. CAREY HART VS. KATY PERRY - WHO YOU GOT???: CHRIS BROWN may have a new battle on his hands -- this one with PINK after she put him on blast for his performance on Sunday night's Billboard Music Awards. Pink tweeted,"One day, if I lip-sync, I hope I do it as well as him."

Husband CAREY HART hit up Twitter to rip Brown as well, tweeting, "I'm pretty sure I saw my wife do that same performance, but she was three months pregnant and actually sang the song." Carey was referring to Pink's 2010 AMA performance of "Raise Your Glass." Like Chris' set-up, there was a half-pipe on stage, where she had bikers and skateboarders doing random stunts.

Initially, though, Carey started taking heat from KATY PERRY fans who thought he was taking a shot at Perry. Katy performed Sunday night on a swing suspended from the rafters, like Pink did at the 2010 Grammys.

Carey Tweeted, "To clarify, I was talkin' trash about [Chris Brown's] performance." Then added, "Looks like someone else's fans got a bit wound up! Funny, that performance looked real familiar too."

Pink must have been caught in the crossfire of Perry fan tweets as well because she later Tweeted, "For the record, I love me some Katy, so y'all can jump off that runaway train, okay?"

SPLITSVILLE - POPULATION KATY PERRY: Word is KATY PERRY is no longer getting all smoove up in FLORENCE + THE MACHINE'S guitarist ROBERT ACKROYD. A source tells Us Weekly, quote, "Katy told him to do his thing and they'll talk soon. No hard feelings. She's really busy and so is he."

BOBBI KRISTINA CAUGHT GAMBLING IN SIN CITY: WHITNEY HOUSTON'S daughter Bobbi Kristina is reportedly under investigation for underage gambling. The 19-year-old was caught on video playing a slot machine at the MGM Resort and Casino in Las Vegas on Saturday while hanging out with her 22-year-old boyfriend. You have to be 21 to gamble in Vegas. The MGM and the Nevada Gaming Commission have launched investigations into the footage.

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If charges are persued, Bobbi Kristina -- who was in town to accept the Millennium Award on her mother's behalf at the Billboard Music Awards Sunday -- could recieve up to six months in county jail or  a $1,000 fine.

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IS 'SO YOU THINK YOU CAN DANCE' JUDGE MARY MURPHY A 'COCAINE-FUELED NYMPHO'???!!!: "So You Think You Can Dance" judge MARY MURPHY has been sued for breach of contract by a former manager. According to his lawsuit, she's a nightmare to work with! He alleges her "increasingly self-absorbed, childish and demanding behavior" interfered with his ability to manage her. And called her a, quote, "desperate, cocaine-fueled nymphomaniac," whose issues included "prescription and illegal drug abuse."

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Mary has not responded to his allegations. The former manager is seeking over $1 million dollars in damages. I don't know about 'cocoaine-fueled' or 'nymphomaniac', but having watched her a time or two on the show, I can safely say Mary is an absolute LUNATIC!!! In a good way.

SNAPSHOT: MARC ANTHONY paraded his 24 year-old Venezuelan girlfriend at a charity benefit the other night. Two words: Yow and Za! ...

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ROMANCE REPORT: Us Weekly reports that ESPN reporter, and former Dancing with the Stars contestant, ERIN ANDREWS is dating Gossip Girl star CHACE CRAWFORD. According to the mag, Andrews and Crawford, brother-in-law of Dallas Cowboys’ quarterback TONY ROMO, have been “spotted out” on “a couple of dates.” Insiders say they are still in the “getting to know each other” phase.

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COULD BE TRUE, COULD BE CRAP - RYAN REYNOLD'S MOM DOES NOT APPROVE OF HIS RELATIONSHIP: RYAN REYNOLD'S romance with BLAKE LIVELY has hit a speed bump – Ryan’s mom. According to Star magazine, Ryan’s mother Tammy does not like her son’s girlfriend-of-eight-months. “Tammy would like to see Ryan with a woman who’s not in the movie business because she feels that, ultimately, actresses put their careers first,” a source told the tab. “And she thinks Blake is pressuring Ryan into settling down before he’s ready.”

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Insiders say Blake and Ryan are “unofficially engaged” and supposedly looking to make THE BIG MISTAKE next summer. And even though Tammy isn’t keen on the nuptials, she started giving her input on the wedding, which left Blake so mad she stormed out of a dinner at Ryan’s family home in Vancouver earlier this month. “Tammy says it proves she’s right: Blake’s a diva,” said the insider. “Ryan is torn between them - and in an impossible position.”

BABY POOP: Former Party of Five star SCOTT WOLF and his wife Kelley are expecting their second child. The couple has a three-year-old son named Jackson Kayse.

BAR REFAELI TOPS MAXIM'S HOT 100: LEONARDO DiCAPRIO'S ex, BAR REFAELI,tops this year's Maxim magazine's Hot 100 list. OLIVIA MUNN, MILA KUNIS, KATY PERRY, OLIVIA WILDE, EMMA STONE, and MEGAN FOX are among those who made the Top 10. KIM KARDASHIAN didn't. In fact, Kim didn't make the list at all, if you can believe that.

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For the first time, readers were allowed to vote, which probably explains why these people made the list: Stephen Colbert, the first man to ever make the list (69), Family Guy character Lois Griffin (85) and one-time convicted murderer Amanda Knox (92). If you have the time or desire, you can CLICK HERE for the full list.

While Kim may not have been hot enough for Maxim, she's more than hot enough for Britain's Zoo magazine. They just named her The Hottest Woman in the World!!! And to prove the point, Kim appears on the magazine’s cover dressed in sexy red satin lingerie.

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USHER CRIES IN COURT FOLLOWING ALLEGATIONS OF BEING OF A BAD FATHER - CLAIMS EX-WIFE ATTACKED HIS GIRLFRIEND: USHER broke down in tears in court yesterday following allegations of being a bad dad. TMZ reports that a lot of the questioning centered around his partying, and when ex-wife Tameka Foster’s attorney implied that Usher loved partying more than his own kids, Usher became teary-eyed and reached for tissues.

Usher, who took the stand in his ongoing child custody battle with his ex, then took the offensive under questioning by his attorney. He blasted his ex, testifying that Foster flew into a jealous rage, hitting him, throwing food, and spitting on his girlfriend when he showed up at her house with his new girlfriend.

Usher testified that Tameka walked to his car and said, "I'm gonna kick your ass. Bitch get out of the car. How dare you bring this woman into my subdivision in my house?" He added, "She continued to spit. At this point she pulled the door open, tried to swing at her." Usher claims he had to get out of the car and block Tameka, who then hit him.

'DANCING' UPDATE - FINALS NIGHT: WILLIAM LEVY, KATHERINE JENKINS, and DONALD DRIVER squared off on last night's Dancing With the Stars. And one of them will take home the coveted mirror ball trophy tonight. Jenkins sits atop the leader board after her two dances last night each earned her a perfect score of 30. Driver and Levy are tied for second with a total score of 59. Each will perform a final dance tonight before a winner is crowned. KELLY CLARKSON and former contestant GLADYS KNIGHT Kelly Clarkson are set to perform.

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