In 'Greece Lightning' you can see some of the muses that are in the Disney film 'Hercules'.
The alien that gets off the Ferris wheel delivers "Erimnevop Yelsgnik Leinad", which is backwards for "Daniel Kingsley Povenmire", one of the series' co-creators.
The voice for the song in the "Bust 'Em" commercial sounds like Candace's allergy-affected voice from "Jerk de Soleil".