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Bikini babe decks hottie at Vegas pool: NY suit

BATHING BRUTE-Y: Lauren Goldfarb sports a ring emblazoned with the word “Hate” at the Hard Rock Hotel and Casino pool in Las Vegas, where she allegedly battered Kristin DiPierro (above) after spotting her chatting up one of her ex-boyfriends.

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What happens in Vegas . . . ends up in Brooklyn Supreme Court.

A sexy Brooklyn reality-star wannabe is suing another woman she says beat her up in a poolside catfight worthy of “Jersey Shore.”

Unfortunately for Kristin DiPierro, 26, the cameras weren’t rolling at the Hard Rock Hotel and Casino last September, when, according to court documents, Lauren Goldfarb, of Point Pleasant Beach, NJ, “viciously, maliciously, willfully and wantonly” pounded on the Marine Park stunner.

The fracas began as DiPierro, who was celebrating her birthday, started chatting up a guy who turned out to be Goldfarb’s ex-boyfriend, DiPierro’s lawyer, Joseph Farella, told The Post.

A furious, bikini-clad Goldfarb stormed over to DiPierro, mocked her choice of bathing suit, and then tried to rip her top off, Farella said.

DiPierro, a graphic designer who hopes to launch a swimwear line, summoned security.

The guards admonished Goldfarb and her friends and told them to move to the other side of the pool, DiPierro says.

Thirty minutes later, Goldfarb returned and started swinging, pounding her on the face and nose with a hard plastic cup, Farella alleged.

DiPierro suffered bruises and lacerations to the face that needed stitches and will eventually require plastic surgery, her lawyer said. She also suffered a broken nose and deviated septum.

“I’m shocked that this happened,” DiPierro said. “I am there trying to celebrate my birthday, and security couldn’t control Ms. Goldfarb like they promised they would.”

Goldfarb’s mother, Lisa Mairowitz, insisted her daughter was “not directly involved” in the Sept. 26, 2010, “bar brawl that involved about 20 girls.”

“It was a handful of young women who should have behaved a little better — including the plaintiff herself,” Mairowitz said, adding that no police report or charges were filed.

DiPierro also claims that the hotel failed to provide proper security, according to the suit filed earlier this month in Brooklyn Supreme Court.

The hotel did not return a call seeking comment.

DiPierro’s sister Colette made headlines last year when she was sued in Staten Island for breaking off her engagement and refusing to return a $17,500 ring. That suit is still pending.

The sisters, who have started a swimwear and apparel line, have profiles on the Reality Wanted Web site and have applied to be cast in a show “along the lines of the Kardashians or ‘Pretty Wild,’ ” according to the site.

william.gorta@nypost.com