Why can't I be a Disney Princess? Evolution of Music - Pentatonix. Extra Takes: The Human Jukebox. History of Wooing Men. Tribute to Ridiculous Voices!! Key of Awesome #70. Christina Grimmie & Mike Tompkins - Fall Out Boy & Alicia Keys. The Sing-off Winner Pentatonix performing "Since U Been Gone" - "Forget You" DIXON CIDER. Medium Pimpin' Pentatonix - Britney Spears Medley. Pitch Perfect Cup Song Mash Up.