Spotted: Dakota Fanning and Kristen Stewart shedding their good girl images in the trailer for their upcoming flick The Runaways. The quick clip shows the girls rocking out to one of the group’s biggest hits, “Cherry Bomb.” Taking on Joan Jett was the role K-Stew was born to play, but the real shocker comes from a scantily-clad Fanning. Let’s all be grateful the fifteen-year-old’s scandalously sexy moves are only for a movie!