Lindsay Lohan and Calum Best are already fighting

Lindsay Lohan's new relationship seems like its as dysfunctional as her family. Lohan and current fling Calum Best have been causing a stir in New York. Between their fighting and Calum's flirting, this romance is bound to blow up any day now.

Last weekend, Calum got frisky with a model in the Bahamas while Lindsay was in the other room. Then on Sunday, he was at it again, "collecting numbers from all the models" at Cipriani Downtown, while Lindsay wasn't looking, says a source for Page Six. On another occasion, one of Lindsay's pals was heard saying, "All her friends wish Calum would go back to London. He's just using her."

On Monday, the pair indulged in a "screamfest" at the Soho Grand, which took place on several floors of the swanky hotel. A spy for The New York Daily News said Lindsay "was screaming about how Calum was cheating on her." The paper reports that the argument got so disturbing to the other guests that Lindsay was asked to go back upstairs. A witness for Page Six said, "Calum's clothes were torn, and after a few minutes, they got back into the elevator and went back to their room."