Kelly Lawler

USA TODAY

It's beginning to look a lot like Christmas for Pentatonix.

The a capella group, who made it big on NBC's The Sing-Off and has delighted us with their covers and originals ever since, is returning to the network for their very own Christmas special. Adding to the a capella festivities are Reba McEntire and Kelly Clarkson, so you know it's going to be a party.

If you're worried about whether the group can pull off an entire hour-long holiday special, fear not. They have three holiday albums already in the can. Plus their cover of Carol of the Bells is downright incredible. See for yourself.

A Pentatonix Christmas will air on NBC on Wednesday, Dec. 14 at 8:00 p.m. ET.