"True Freaks Union"
From South Park episode 601- Freak Strike in which Butters puts balls on his chin to get on TV and win a prize for Stan Kyle and Cartman
Stan: This is gonna be so funny!
Butters: Uh, it sure is!
Kyle: But how are we gonna get the balls put on Butters' chin?
Butters: Hah yeah, how are we go-? Wait... Butters' chin?
Butters: Uh, but that's me. I'm Butters.
Stan: We know. You're the one doing it, Butters. Who'd you think we were talkin' about?