Jewel To Judge NBC’s ‘The Sing-Off’

NBC Renews ‘The Sing-Off’ For Season 4

NBC Renews 3 Shows Including ‘Loser’

NBC has renewed three unscripted programs for the 2011-12 season, including the popular weight-loss competition series The Biggest Loser. Who Do You Think You Are?, from Lisa Kudrow, and the singing competition series The Sing-Off are also returning.