Unbeknownst to Eric Cartman and the boys, his "evil" twin from another dimension take turns helping carve Kenny McCormick's squash in place of a pumpkin, which he could not afford. Ironically evil Cartman is nice, polite, and wears a beard and mustache. While carving the squash, he sang this song.
You guys are my best friends
Through thick and thin, we've always been together
We're four of a kind, havin' fun all day
Pallin' around and laughin' away
Just best friends, best friends are we.
I love you guys.