South Megavideo Whats The Name Of This Song?

Whats the name of this song? - south megavideo

Featured in this episode of South Park, 18:30 -> 18:45

http://www.megavideo.com/?v=QIB5W4XB

(Click the play button in red, and the play button Greeen. Leapfrogging 18.30)

Thank you guys