The Frazzletones, a backup singing group of monsters, appeared on Sesame Street in 1975 singing the song "Frazzle" with Frazzle himself. The song was released on the album The Sesame Street Monsters!.
The Frazzletones were performed by Christopher Cerf, Richard Hunt, and Jerry Nelson. Maurice Monster was one of the monsters. Another particular Frazzletone member was a monster clone of Little Chrissy, from Little Chrissy and the Alphabeats. The monster was created from the dark-blue puppet usually used for Harvey Monster, with a yellow wig and glasses added.