One summer day, as Little Worm heads out to play, he discovers he has a song stuck in his head. "What's that you're singing?" Owl asks, but Little Worm can't say. He wriggles past, determined to learn who filled his head with "Shimmy shimmy, no-sashay." Owl flaps along with a song of his own, and before long Chipmunk, Bunny, and Fox fall in line, each contributing an ear worm to the joyful cacophony. Amid all the singing and dancing, Little Worm forgets his musical mystery until later when--surprise!--Papa Worm tucks him in. Hip, vintage-inspired illustrations and whimsical typesetting meet movement, sound play, and comic, cumulative delights in a picture book that will charm media-savvy children and their parents alike.