From the NBC web site - ""The Sing-Off" is a four-night event premiering Monday, December 14 (8-10 p.m. ET) that features a one-of-a-kind battle of voices that continues on December 15 and 16, culminating with a live finale on December 21 (8-10 p.m. ET each night).
The show will feature the country's top eight a cappella groups performing popular songs in a way that viewers never heard them before. There's no lip-synching, back-up bands or safety net. They'll be singing for America's vote with the winner walking away with the ultimate prize -- an Epic Records/Sony Music recording contract."
With the enormous success of "Glee", you had to know this was coming. I am assuming they won't autotune the shit out of the songs like they do on Glee, so I'll be tuning in fer sure! Although how much Nick Lachey I can take is anybody's guess.
(Full disclosure: I was not compensated in any way, shape or form for this plug. Just so you know. Although I'm pretty sure I could've left this out, since I am fairly certain that NBC and the FTC have no idea whatsoever that I exist.)