"Dance of the Sugar Plum Fairy" is a variation of a song from the ballet, The Nutcracker and was played during the Season Two episode "Merry Christmas Charlie Manson!" and the Season Four episode, "A Very Crappy Christmas".
Background[]
This song is used as a background music in "Merry Christmas Charlie Manson!", as Charles Manson hot-wires a vehicle to take himself and the boys to the Mall of Nebraska.
In "A Very Crappy Christmas", the boys walk through a sewer to search for Mr. Hankey, as he has not shown up yet for Christmas. Meanwhile, Cartman sneezes on Kyle's back and Kyle yells in disgust. Cartman then notes how it is ironic that Kyle is grossed out by that instead of the fact that he is walking in human feces.