Free Cake

When Rigby digs up a good-looking plate from the garbage, he and Mordecai decide to use it by eating a piece of chocolate cake on it. As their efforts prove fruitless, they decide the only way forward is to convince the solitary Skips to have a birthday party.

Roger L. Jackson

Baby #1 (voice)

Robin Atkin Downes

Baby #3

David Kaye

Baby #2

Casey Kasem

Vocalist (voice) (uncredited)