NBC's "The Sing-Off" returns tonight with another round of a cappella groups singing their hearts out and vying for a Sony Music recording contract and a $100,000 cash prize. As with last year's inaugural competition, the host is singer/actor Nick Lachey along with the returning three judges - singer Ben Folds, R&B singer and former Boyz II Men member Shawn Stockton and Pussycat Dolls lead singer Nicole Scherzinger.

This time around, however, the competition is closed off to only include U.S. groups but there will be 10 groups in the beginning (instead of eight last year) and the show has expanded from four episodes to five. Two-hour installments air Monday and Wednesday at 8:00/7:00c this week and next with the live finale airing on Monday, December 20th at 8:00/7:00c. Our Jim Halterman caught up with Lachey recently to talk about what's to come in this cycle of "The Sing Off" and what else he's up to in his busy career.

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