Pentatonix's official genre is a cappella, but a close unofficial second is Christmas music. The five-member group has put out three Christmas records since 2012 -- PTXmas, That's Christmas To Me and A Pentatonix Christmas -- all of which have become staples on the Holiday Albums chart, each of them sitting in the top 10 currently with last year's A Pentatonix Christmas topping the list.
Christmas classics such as "Little Drummer Boy," "Hallelujah" or "Santa Claus is Coming to Town" have been covered countless times over the decades, but Pentatonix separates from the pack with mesmerizing vocal harmonies that can give you chills or feel all warm and fuzzy inside.
Here are 10 of Pentatonix's best Christmas songs.