Oops! Michelle Williams flashed black underwear under her white gown at the Los Angeles premiere of her new film, "Oz the Great and Powerful" Feb. 13, 2013, in Hollywood, Calif. The actress' white Prada gown had a slit up to her hip which was bound to have a wardrobe malfunction. But her Kate Young for Target clutch did blend into her ensemble. "Oz the Great and Powerful" is a Disney production. (Steve Granitz/WireImage/Getty Images)