Baby Piggy's Night at the Ball is a 1987 Muppet Babies storybook in the Weekly Reader Book series. Baby Piggy is planning a costume ball for her dolls with music and dancing and refreshments and prizes for the best . She invites Baby Kermit, but he declines as he is playing pirates with Baby Fozzie. When Baby Gonzo shows interest, Piggy rejects his request, fearing he'll make a mess. As Piggy begins to get the dolls down from their shelves, she imagines what it would be like to get ready for a ball with her two favorite dolls, Esmerelda and Giselle, and a stuffed clown named Oliver.