Michael Davidson contributed to the Madonna movie Who's That Girl with the track "Turn it up" in (1987) (produced by Stock Aitken Waterman and Phil Harding) for Sire Records, which became a huge dance hit in the worldwide charts. Unlike the movie, the soundtrack to Who's That Girl became an big international success spending many weeks in the Top Ten Album Chart in the United States, Europe and Asia. Released on July 21st, 1987 the album sold almost 5 million copies worldwide, of which 1 million in the US (Platinum). The Washington Post described the song as "gratingly banal" and its singer as "one of Madonna's photogenic protegés"[1]

Discography:
Michael Davidson: 'Turn it up', 1987, 12-inch single. Sire Records.
Warner Music: 0-20671. Tracklist:
1. Turn It Up (In Full Cry Mix)
2. Turn It Up (Instrumental)
3. Turn It Up (Dub Mix)
4. Turn It Up (7" Remix)

Michael Davidson: 'Warehouse', 1989, 12-inch single. Sire Records.
Warner Music: 21288. Tracklist:
1. Warehouse (Real Club Mix)
2. Warehouse (Radio Mix)
3. Warehouse (Groove Mix)
4. Warehouse (Instrumental Mix)

References:
[1] Brown, Joe. "The Miami Movement; Three New Albums With Salsa's Strong Flavors", The Washington Post, September 2, 1987. Accessed October 4, 2008. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.