This permanent A list singer thought he met the love of his life. She had previously been married and was wealthy. She hobnobbed with big celebrities who adored her. Our singer was head over heels in love. He moved into her home. Soon after moving in, our singer signed an agreement which allowed his girlfriend to manage him. It was a very one sided contract in favor of the girlfriend, but the singer was in love and thought it was fine. It was fine until he realized just how much money the girlfriend was making off him.
She refused to renegotiate the contract. She refused to terminate the contract. So, our singer arranged to be out of town and had a mafia hit man murder the girlfriend at point blank range in the driveway of the girlfriend. There was someone with the girlfriend who was spared but remained silent for the rest of their life about who they saw pull the trigger.
Can you name the (old school) singer?