Reality singing competitions have created their share of pop stars over the years -- and one of the newest additions to the club is Pentatonix. The Texas-based a cappella group won NBC's The Sing-Off back in 2011, scoring $200,000 and a recording contract with Sony. Since then, they've put out two full length albums (PTX Vol. I and II) and a Christmas EP, and racked up hundreds of millions of YouTube views. Their latest offering, 2014's That's Christmas To Me, fortifies the group's holiday fortunes, peaking at #2 on the Billboard 200 album chart.
The group appeared in the Soundcheck studio earlier this year to share a couple of originals, a Christmas classic, and a few of their famous pop covers, and to talk about their skyrocketing career.