The A-list hit the red carpet for the biggest style showdown of the year last night, at the Schiaparelli And Prada: Impossible Conversations Costume Institute Gala 2012. So who was there, and most importantly, what did they wear?
Rihanna, Gwyneth Paltrow and Cameron Diaz. Photos: Getty Images
From Rihanna in Tom Ford to Gwyneth Paltrow in Stella McCartney, take a look below to see all the gowns from the red carpet, and let us know who gets your vote for best dressed in a comment.