Ben Harper 'Rock N' Roll Is Free' on Letterman

Singer performs 'Rock N' Roll is Free' from his new album

Ben Harper and his band stopped by Late Show with David Letterman last night to perform "Rock N' Roll is Free," the first single from his brand new album Give Till It's Gone. Harper's road-tested chops are on display in this performance, with his band knocking out the song's Neil Young-ish hooks with the enthusiasm of a garage band and the precision of old pros.