On the Set of "The Sing Off"

YH goes behind the scenes at NBC's hit singing competition show, "The Sing Off", where troupes use nothing but their voices to make beautiful music together! The show's host and judges know a little something about making beautiful music too -- Nick Lachey, Jewel, Ben Folds, and Shawn Stockman share their thoughts on Season 4 and reveal their own signature songs! Hosted by Nikki Novak (@nikkinovak).Check out the Young Hollywood Store Here: http://shopyounghollywood.com/