Four men, one woman Pentatonix, Season 3 Sing-Off Champs, places a sumptuous slice of holiday cheer on our mantelpiece, "That's Christmas to Me." Some of our favorites among the 10 cuts are reinvented traditional hymns like the opening cut "Hark the Herald Angels Sing," "Mary Did You Know," and "Silent Night;" popular Christmas songs like "Sleigh Ride," a "Winter Wonderland"/"Don't Worry, Be Happy" medley that features guest artist Tori Kelley, "It's the Most Wonderful Time of the Year," "Santa Claus is Coming to Town," "Dance of the Sugar Plum Fairy;" and three songs new to our ears: Robin Pechnold's "White Winter Hymnal," Robert Lopez & Kristen Anderson-Lopez's "Let It Go," and the beautiful, nostalgic title track, written by Pentatonix. One of our favorite Sing-Off winners, Pentatonix truly celebrates the human voice with stunning arrangements, unbelievable leads and harmonies and vocals that redefine a cappella. Don't miss this one!