In 2011, an unknown five-person a cappella group called Pentatonix won the TV show The Sing Off.
Pentatonix - "Say Something" (A Great Big World & Christina Aguilera Cover)
January has brought us many things, including a great new band name (The Polar Vortices), a number of exciting opportunities, and the beginning of competition season.
Sesame Street: Pentatonix Counts (& Sings) to Five
Christmas Light Show - "Little Drummer Boy" by Pentatonix