Chris Brown’s famous temper flared up again before the Billboard Music Awards when he angrily confronted a stranger over a group of girls in a top Vegas club.

According to witnesses, Brown spent more than two hours Saturday night at Haze at Aria charming a group of young women and buying multiple bottles of Champagne.

But one witness said, “Brown got visibly upset when the girls moved on to the next table. Brown approached the guys in the group [at the next table] and started getting visibly agitated. Brown stood up, and looked like he was about to start a fight when club security stopped him.”

While Brown’s rep insisted the account was “not true,” our witness continued: “He got in the guy’s face and was cursing at him, and saying, ‘Are these girls with you or with me?’ The guy was stunned by it. Things were close to getting extremely ugly. Then Chris’ security and club security escorted him out.”

A Haze rep confirmed there was an incident involving Brown but declined to go into detail. The club rep said, “Haze has a zero tolerance policy for violence.”

Brown performed his hit “Turn Up the Music” at Sunday’s Billboard awards with an impressive dance routine, but sparked some backlash over his alleged lip-syncing.

After picking up the Top R&B Artist award, he later dined with Justin Bieber at N9NE Steakhouse in Palms Resort Casino with a group of 30 friends, feasting on surf and turf and lobster mash. Brown later went on to celebrate at Vanity Nightclub inside the Hard Rock Hotel & Casino with bottles of Ace of Spades Champagne, but declined photos with fans.

Earlier on Friday night at Marquee, Brown — this time out with his girlfriend Karrueche Tran — treated the packed house to a surprise performance. He got on the mike during Benny Benassi’s set, launching into their hit song “Beautiful People” and their new song “Don’t Wake Me Up,” dedicating it to all the ladies.

Elite.