The Sing-Off was an American television singing competition featuring a cappella groups. It debuted on NBC on December 14, 2009, and was produced by Sony Pictures Television and Outlaw Productions, with Mark Burnett's One Three Media being added for the fourth season. A fifth season aired as a holiday special in December 2014.
The Sing-Off
Jewel was the new judge for the fourth season, replacing Sara Bareilles
Patrick Stump was the new judge for the fifth season, replacing Ben Folds
Music performed a cappella, less commonly spelled a capella in English, is music performed by a singer or a singing group without instrumental accompaniment. The term a cappella was originally intended to differentiate between Renaissance polyphony and Baroque concertato musical styles. In the 19th century, a renewed interest in Renaissance polyphony, coupled with an ignorance of the fact that vocal parts were often doubled by instrumentalists, led to the term coming to mean unaccompanied vocal music. The term is also used, rarely, as a synonym for alla breve.
A cappella
The Hullabahoos, an a cappella group at the University of Virginia, were featured in the movie Pitch Perfect
The Oxford Alternotives, the oldest a cappella group at the University of Oxford in the UK
The Sweet Nothings are one of the University of Exeter's eight a cappella groups. They are one of the oldest and most successful girl groups in the UK
