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The Sing-Off
American television singing competition
The Sing-Off
The Sing-Off is 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 (for a time called United Artists Media Group) being added for the fourth season. A fifth season aired as a holiday special in December 2014.
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