Ben will perform on the live finale of NBC’s “The Sing-Off” Monday night (December 21, 2009), in which one a cappella group chosen by viewers will win $100,000 and a recording contract. Besides Ben, the show will feature performances by Natasha Bedingfield, Smokey Robinson and vocalese master Bobby McFerrin, and fellow judge Shawn Stockman will rejoin his Boyz II Men bandmates for a reunion performance.