Playing on server: Season 4

The Sing-Off - Season 4

Featuring the country's best a cappella groups performing popular songs like you've never heard them before. There's no lip-synching, backup bands or safety net. They'll be singing for America's vote, with the winner walking away with the ultimate prize - a Sony Music recording contract and $100,000.

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Country: US

Studio: NBC

Runtime: 120:85 minutes

Quality: HD

First air date: Dec 14, 2009

Last air date: Dec 17, 2014

Episode: 28 Episode

Season: 5 Season

IMDb: 6.3