Pentatonix on Katie Couric ~ Top Tunes of 2012 Medley

On the , 2012 episode of her talk show, Katie Couric invited Pentatonix to perform a medley of the year’s top 5 most shared songs on facebook. *Check out Pentatonix performing their a cappella arrangement of “Gangnam Style“ live for Katie Couric here: *PTX also performed “Angels We Have Heard On High“ from their new holiday EP “PTXmas“ in the Katie green room, which can be viewed here: