New exciting NBC show: "Clash of the Choirs"

'Clash of the Choirs' is a live four-night musical event coming to NBC in December 17th. "Clash of the Choirs," has tapped five musical superstars -- Michael Bolton, Patti LaBelle, Nick Lachey, Kelly Rowland and Blake Shelton -- to embark on a musical challenge as they return to their hometowns to assemble an amateur choir and prepare them to compete live in studio for the title of America's best