. "Pentatonix (album)" . "''Pentatonix'' (album)" . "Sing" . "their eponymous album" . . . . "self-titled" . . "Cracked" . . "Pentatonix (album)" . "''Pentatonix''" . "self-titled album" . . . . . "Pentatonix" . . . "eponymous album" . "Light in the Hallway" .