On Saturday evening, the former OC star headed to MOCA Grand Avenue for “The Artist’s Museum Happeining,” a Chanel-sponsored event that drew many of Hollywood’s most interesting luminaries. Bilson wore a fabulous little quarter-sleeve dress—the same dress that model Georgia May Jagger wore during the label’s Resort 2011 presentation in France.Rachel Bilson Hot Photos MOCA’s Annual Gala “The Artist’s Museum Happening”