During the evening , Alexandra (Richard sisters) started flirting with Mary-Kate's man, the tiny twin "got into a huge fight with Alexandra and totally told her off," one witness said. "After the fight, Olsen and the rocker guy started full-on making out in a territorial 'this is my man' way."

In other news, Mary-Kate Olsen and her sister were turned away when they tried to get into an exclusive dinner hosted by Mario Testino to honor French Vogue editor Carine Roitfeld.

"There weren't places for them because they hadn't RSVPed," says one unnamed guest. "They were refused entry at the door!"