Pentatonix

Pentatonix is a Grammy-winning a cappella group from the United States, formed on the NBC reality show 'The Sing-Off' in 2011. Known for their tight harmonies and genre-bending arrangements, they have released several successful albums, including 'PTX: Vol. 2' and 'Byzantium'. With a reputation for energetic live performances, Pentatonix has been on hiatus several times, but they continue to tour and produce new music.