It was a movie between 1980-2000 I saw on TV. It had a loser guy who was granted wishes. He wished to meet this singer, then he wished to have sex with her, then he wished to BECOME her and did, leaving behind this goo. Then he tried to take her place on stage but couldn’t sing so he got booed off the stage. It it NOT Bedazzled.
Friday the 13th: The Series S02E20 – “The Secret Agenda of Mesmer’s Bauble”