One Direction Shows Off American Accents, Underwear & Mustaches on Jimmy Kimmel Live.

The guys of One Direction were invited onto the Jimmy Kimmel Live show to participate in a set of challenges to put Harry, Liam and Zayn against Niall and Louis... and that was just one of their challenges. There are a ton of fun challenges that the 5 guys took on from their quarters while on a stop in Nashville, Tennessee -- all via Skype.

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