The Sing-Off

Watch The Sing-Off full movie online Movies123. Watch The Sing-Off 123movies online for free. The Sing-Off 123movies: 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.