Rihanna will try her hand at acting with a role in Battleship, rescheduled to premiere next summer. The Bajan beauty stars as a female captain who oversees the ship's safety. Naturally, we have our concerns. Top songstresses always wind up acting, and the results are often dismal. We believe in RiRi, but we just won't be surprised if her debut role is comparable to the 15 Worst Acting Performances by Female Singers. Keep reading to see which ladies are better suited for music videos than motion pictures.