On this day in music history: July 21, 1987 - “Who’s That Girl - Original Motion Picture Soundtrack” is released. Produced by Patrick Leonard, Madonna, Stephen Bray, Jay King, Denzil Foster, Thomas McElroy, David Agent, Stock Aitken & Waterman, David Gamson, John Potoker and Hubert Eaves III, it is recorded in Various Studios from December 1986 - March 1987. The album serves as the soundtrack to Madonna’s third film (originally titled “Slammer”), featuring four new songs by her as well as tracks by Club Nouveau, Scritti Politti, Coati Mundi, Michael Davidson, and Duncan Faure. Though the film is universally panned by critics and flops at the box office, the soundtrack album performs well, spinning off the singles “Causing A Commotion” (#2 Pop) and the chart topping title track. “Who’s That Girl - Original Motion Picture Soundtrack” peaks at number seven on the Billboard Top 200, and is certified Platinum in the US by the RIAA.