Radioactive - Lindsey Stirling and Pentatonix (Imagine Dragons Cover),[Official Video] Aha! - Pentatonix (Imogen Heap Cover),[Official Video] Save the World/Don't You Worry Child - Pentatonix (Swedish House Mafia Cover),NSYNC Medley - Pentatonix,As Long As You Love Me / Wide Awake - Pentatonix (Justin Bieber / Katy Perry Cover),End of Time - Pentatonix (Beyonce Cover),We Are Young - Pentatonix (Fun Cover),Somebody That I Used To Know - Pentatonix (Gotye cover),[Official Video] Carol of the Bells - Pentatonix, PTX- Mix Tape