U.S. singer and reality television personality Nick Lachey is set to return as host of the second season of "The Sing-Off," NBC said Thursday.

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The a cappella singing competition series is being scheduled as a five-night holiday event premiering Dec. 6. The battle of voices will then continue Dec. 8, 13 and 15, culminating in a live finale Dec. 20, during which one of 10 a capella groups will walk away with the $100,000 prize and a Sony Music recording contract.

"'The Sing-Off' will feature a cappella groups performing popular songs from various genres, arranged and sung like you've never heard before," NBC said in a release. "There is no lip-synching, back-up band or safety net. Ultimately, America will decide the winning group."

Returning celebrity judges Ben Folds, Shawn Stockman and Nicole Scherzinger will critique each performance, narrowing down the finalists to the top three groups competing for America's vote, NBC said.