Premieres: Monday, Sept. 19 at 8 p.m. ET Expect to see:The show's move into the fall line-up expands its run to 11 episodes. Sixteen new acapella groups will compete for the grand prize of a Sony Music contract and $100,000. Not a fan of unaccompanied singing? Then watch for host Nick Lachey's delightful banter. Liz Kelly Nelson, Zap2it Related: "The Sing-Off"
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