Now the group of 20-somethings are back to take on Daft Punk in celebration of the new album Pentatonix album, "PTX Vol II."
Watch as the group Pentatonix-ize hits like "Harder, Better, Faster, Stronger," "Celebrate," "Get Lucky" and "One More Time." It's pretty hard to take your eyes and ears off them.
The group was initially recognized for winning NBC's Season 3 of "The Sing-Off," but they have since spread their wings and are about to begin a tour in 2014.
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