Best Celebrity Pictures Week of May 12, 2012

Stars were all over the globe this week promoting films and making fashionable appearances at some of the swankiest events, including the Cannes Film Festival. Snow White and the Huntsman stars Kristen Stewart and Charlize Theron premiered their fairy tale in London, while Diane Kruger was spotted at a Calvin Klein party in Cannes with boyfriend Joshua Jackson. The X Factor revealed new judges Britney Spears and Demi Lovato during the show's upfront presentation in NYC, and What to Expect When You're Expecting leading ladies Cameron Diaz and Jennifer Lopez screened their romantic comedy together in LA. That's not all that went down — check out what other stars were up to.