To Hell with the Devil (1982)

A shmo makes a deal with the devil so he can become a great Pop star just to impress his dream girl. After he makes the deal, a catholic priest hangs around him to try and convince him that he screwed up and he needs to get his soul back or he'll be damned for eternity. Well, everything goes bad for the shmo and he wants his soul back. But, the devil's lacky doesn't want to give it back. So the priest and the devil's lackey go at it mano y mano.