'The Sing-Off' preview: Host Nick Lachey says the groups have 'nowhere to hide'

With auto-tuning and catchy instrumentals, anyone can be a singer nowadays, which is what makes NBC's "The Sing-Off" a rare animal. The show originally got a boost from the popularity of FOX's hit, "Glee," but it takes away all of that show's safety nets.

"I think the great thing about this show is that it is a capella," executive producer and host Nick Lachey tells Zap2it. "And there is nowhere to hide when you don't have a big band behind you... Your talent really comes through and your struggles, at the same time, come through as well."

The show returns for its second season with celebrity judges, former a capella singer Ben Folds (Ben Folds Five), the supportive Shawn Stockman (Boyz II Men) and the sweet Nicole Scherzinger (The Pussycat Dolls) and 10 new a capella groups who will face elimination over five nights of competition for the ultimate prize of $100,000 and a Sony Music recording contract. 

Lachey, who got his start in pop group 98 Degrees, says it'll be a fight to the finish. "In the end it's really going to come down to the a capella music," he says. "And who can pull that off night in and night out on stage and in front of a national audience."

Take a look at the groups' opening number:

"The Sing-Off" premieres Monday, Dec. 6 at 8 p.m. ET on NBC.

Will you be humming along with "The Sing-Off"?
Photo/Video credit: NBC