Keira Knightley sings in her upcoming movie, The Edge of Love, but don't expect her to go ScarJo and put out an album! (Good thing, too, 'cause Scarlett's album tanked!) "I did some lessons with a voice coach because I can't sing. There were 100 extras and John [Maybury, the director] was like, 'Now you're going to sing…,'" she tells Total Film. "I've never been so frightened in my entire life. I don't know how singers do it. I never want to have to do it again. I don't want to be a rock star."

Peep this video from The Edge of Love, then vote on which actress' voice you like better: Keira's or Scarlett's.