Opening number for Season 2, Episode 2, "Use Somebody" originally by the Kings of Leon available on "The Sing-Off: The Best of Season 2" on iTunes at http://bit.ly/dWmLhM or on amazon.com at http://amzn.to/ej8Oxh. Also available on "The Sing-Off: Season 2 - Episode 2 - Big Hits" on iTunes at http://bit.ly/hFGlny or on amazon.com at http://amzn.to/gBRLle. Buy the full Episode 2 (202) on iTunes at http://bit.ly/gaS1RY or on amazon.com at http://amzn.to/gS2EHW.