Double threats: Musicians who act

Published On: Sep 30 2013 12:56:43 AM CDT   Updated On: Jun 25 2015 01:00:00 AM CDT
Rihanna in Battleship

For some singing stars, dominating the music world just wasn't enough. From Frank Sinatra to Rihanna, take a look at musicians who have tried their hands -- with varying success -- at acting.