The Sing Off is back! “The Sing-Off” originally premiered in December 2009 as a five-night event and became a weekly series in 2011. This December, it will take on more of a holiday feel. This year’s season will run for seven episodes, with the finale set for telecast on Monday, Dec. 23 with a two-hour episode. The program is a showcase for the country’s top acappella groups performing popular songs in new and innovative ways. “The Sing-Off” has no lip-synching, back-up bands or safety net. The winners get a recording contract and $100,000. Stakes are high and dreams are bigger than ever. Nick Lachey returns as host. Joining him are musicians, Ben Folds and Shawn Stockman. The Sing Off premieres December 9^th on NBC. Check local listings for times.