Bieber's nightclub brawl revealed to be over waitress and bowtie

Justin Bieber's brawl outside South Pointe nightclub in Hamptons on Sunday, started over an attractive waitress and a bow tie, it has been revealed.

A witness has confirmed that the 'Baby' hitmaker had left the club with two waitresses.

But the guys on the next table were not happy as one of the waitresses - a very attractive blonde, was flirtatiously wearing a bow tie, which one of the guys on the next table had loaned to her, the New York Post reported.

The witness added that as the waitress got into Bieber's SUV, the guys chased her out, saying that they wanted the bow tie back, to which Bieber's security pushed back, and a scuffle started.

He added that as the 19-year-old popstar and his team drove away, someone threw a rock at his car and Bieber jumped out of the sun roof and got on the hood of the car, while his security knocked the guy to the floor.

Police had taken the injured guy to Peconic Bay Medical Center, who was discharged yesterday, and are now investigating members of Bieber's team of bodyguards who are accused of assault.