Theme From Mahogany (Do You Know Where You're Going To?) - Diana Ross (1975)
Seventies pop rock perfection from the former Supreme, who seemed to be enjoying the hell out of being a diva. Oddly enough, the movie isn't half-bad either, being one of the three must see Diana Ross vehicles.
Mariah sure loved covering Diana songs. Hey, at least it's better than the J.Lo version!