Has worked extensively with
Madonna. Was a key producer on her "True
Blue", "Like A Prayer", "Who's That Girl Soundtrack", "I'm Breathless"
and "Ray Of Light" albums, and produced/wrote her #1 hits "Live To
Tell", "Open Your Heart", "Who's That Girl?" and "Like A Prayer". Two
of their collaborations ("Who's That Girl?" and "I'll Remember") were
nominated for both Golden Globes and Grammys. He was the musical
director for her 1987 "Who's That Girl?" Tour and played keyboards on
her 1985 "Virgin" Tour.