Ever wonder what song is stuck in Lucy’s head as she yanks the football out from under Charlie Brown’s foot? Wonder what the gang in the Mystery Machine is grooving to as they drive to the latest haunted amusement park? Well, wonder no more. Illustrator Karl Heitmueller Jr., has figured out what your favorite cartoon characters have been listening to all of these years. Shaggy loves Peter Tosh? Of course he does. There are several more strips on Heitmueller’s site, so be sure to follow the link if your favorite isn’t here.