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