I like the contrast and the angle of this image but the crop IMHO is uncomfortably tight. I would say that you needed either more of the players head or more of the guitars body.
Nice enough shot, but the girl looks like a manakin to me, looks like a touch too much neat image or something. The skin has a kind of plastic appearance.
Not usually a good idea to chop hands in half when photographing musicians. A square crop discarding the entire right portion of your shot would be much stronger, and would highlight the emotive nature of this performance.