Torch (1990)

A porn director's wife thinks the script he's developing for his hot new starlet is a true story.
The story of a beautiful young singer, a song, and a man's hopeless obsession with each. As they become tangled in a web of intrigue that spins as sure as a disc on a turn-table. And as hot as the tip of a flame. A flame named Heather, in a story called Torch.