#Random - Joan Jett and the Foo Fighters on Letterman

So ... I knew the music but I didn't know a lot about Joan Jett until I saw the movie The Runaways! What an awesome, twisted story. And then I realize who the woman was behind these timeless songs. So apparently Joanie jumped on stage with the Foo Fighters at their show at MSG. SO ... Here they are performing last night on Letterman. Is her voice awesome or what? Pure Rock & Roll Chick!