The Sing-Off S3 Ep.5 Opener: All Night Long

Opening number for Season 3, Episode 5, "All Night Long" original by Lionel Ritchie available on "The Sing-Off: Season 3: Episode 5 -- Guilty Pleasures" on iTunes at http://bit.ly/nkGJCB. Watch "The Sing-Off" Monday nights at 8:00/7:00 Central on NBC. Hosted by Nick Lachey with judges Ben Folds, Sara Bareilles and Shawn Stockman. Air date: October 17, 2011