Melinda Doolittle sang “Since You’ve Been Gone.” She's winning hearts all over including Simon's! Randy Jackson said “All you need is to have confidence and believe in yourself, because you’ve got the natural gift.” Paula Abdul said “No more background singing, you are a frontrunner.” Simon Cowell said “You are an incredible singer, you have a fantastic story, you are a fantastic person, I really hope you do well.” Watch Melinda Doolittle's performance after the jump...