A competition between two or more singers where each tries to do better than the last.
2014 , Cathy Bramley , Conditional Love , The two of them engaged in a sing-off until they realized that both tunes had the same beat.
2015 , Ethan Mordden , Sing for Your Supper: The Broadway Musical in the 1930s , This really is Anything Goes, not just a Cole Porter sing-off using portions of the Anything Goes narrative.
2015 , Steve Brookstein , Getting Over the X , There's nothing like the life-or-death drama of an X Factor sing-off.
