Rock On: Secret Celebrity Musicians!

Anne Hathaway! Halle Berry! Johnny Depp! See which Hollywood stars moonlight as musicians

JENNIFER GARNER

Like Berry, the Valentine's Day star spent her high school years as a die-hard band geek, picking up the saxophone at George Washington High School. "I was proud of it," Garner told PEOPLE. "I picked it up again a couple of years ago, and I sound God-awful now!"