Quote from Stuart in the episode Spoiler: Gary Dies
Penn: Juggling two... [yelps] Juggling two starving feral creatures, as, uh, you can see, is not difficult, but... [rats squeal; Penn groans] Juggling three is... [grunts] profoundly stupid. Ow! Bert: I saw them in Vegas. Such a fun night. Stuart: Oh. You know who I loved in Vegas and I didn't think I would? Bert: Huh? Stuart: Celine Dion. Bert: Mm.