How early is too early to begin your Christmas caroling? Never, if you sound as Pentatonix do. We caught up with the The Sing-Off winners ahead of the American Music Awards on Sunday and asked them if they might ring in the holiday season with a tune. The group has just released their second EP, a Christmas collection called PTXmas, so they had a few festive options ready to roll and they happily obliged. Above, check out the group singing “Angels We Have Heard on High” on the AMAs red carpet.