A few years ago our very own JR Mitchell turned us on to the acapella vocal stylings of the group known as Pentatonix. They were just coming into their own at the time, but everyone was blown away by how great they sounded with no musical accompaniment. Since that time they've turned out a lot of cover songs and a few originals. Recently, they released a cover of 'Mary Did You Know,' one of the most popular songs of the Christmas season.


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