Main character exclaims “sing out”!

While breaking into a bank safe, a gangster overhears a bank employee singing and decides to put her in a Broadway revue

The grubby denizens of "Sing!" Karaoke bar become gorgeous creatures when they stand on the tiny stage, but their music is threatened by the corporate chain, "Mark and Bingo's" moving in across the street.

When a volatile young street tough with a talent for singing and dancing is tapped by the high school music teacher to lead the upcoming senior "Sing," he is forced to come to terms with his defiant self-destructive lifestyle and his growing attraction to his co-star.