Pentatonix has been killing the a cappella game since they blew up on YouTube awhile ago, and this rendition of *Joy To The World* will help skeptics understand why. With Christmas just around the corner, the five-person group released this harmonious number to celebrate the holiday season. The song has debuted at number one (the first in a cappella group history), and is part of their new album *That’s Christmas To Me.* Watch their performance of the song below — If this doesn’t get you into the holiday spirit, nothing can.
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