Billy Eichner's Funny or Die series, Billy on the Street [1], has spawned some pretty hilarious videos [2], but few are as good as Eichner's insane, holiday-themed sprint around NYC in 2013 with his Parks and Recreation costar, Amy Poehler [3]. Spreading Christmas cheer (or something like it), the pair dressed in some old-timey holiday garb and force strangers to finish popular carols with them. And when they can't remember the lyrics? Well, they aren't happy.