I just got a shock of recognition that this and some of my other posts assume that bad/sick taste equals amusing. Maybe not so to some, so first check if this crass Roman singer seems funny. In this movie he is ubermacho, but youtube also shows the original broadway version where he was softened to be quite effeminate.
IF you can find amusement in that, below is what I originally posted. Maybe there is something wrong in finding musical hilarity in modern tragedy, but the singer is half Cherokee satirizing his redneck relatives lifestyle.