We Must Have Been Good This Year, Because PTX and BSB Blessed Us With a Christmas Duet

Pentatonix's holiday special was full of star-studded performances. In addition to performing a chilling duet with Kelly Clarkson, the a cappella group was also joined by '90s boy band Backstreet Boys for a stripped-down rendition of "Winter Wonderland." The groups were in perfect harmony as they sang the holiday tune at Planet Hollywood, where BSB is currently performing their Las Vegas residency. While we have plenty of new BSB music to look forward to in the new year, this performance really has us wanting a full-length BSB Christmas album.

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PTX and BSB - Winter Wonderland (Snippet)