Your Prize for Solving This "12 Days of Christmas" Trivia? Five Golden Rings

The gifts of Christmas are coming in hot, and this one may top the list: Pentatonix, elite a capella group, released a recording and accompanying video of "The 12 Days of Christmas" on Instagram today, and the vocals are pristine. The song has always been a favorite (as has its spoof version, "The 12 Pains of Christmas"), but this cover has brought on a newfound appreciation for it. What do you know about the tune?