A song from the SouthPark Movie (Bigger, Longer, and Uncut). It was nominated 2/16/2000 for an Oscar award for Best Original Song. It is on the official soundtrack for the movie.
Trey Parker and Marc Shaiman were nominated for creating this song.
The IMDB under "crazy credits" notes that the songs are credited by being sung by the characters in movie, not by the actual people.