On September 12 1987, the Who’s That Girl: Original Motion Picture Soundtrack hit #7 on the Billboard Top 200 Albums Chart in the USA.
Madonna had this to say about the music on the soundtrack:
“I had some very specific ideas in mind, music that would stand on its own as well as support and enhance what was happening on screen and the only way to make that a reality was to have a hand in writing the tunes myself… The songs aren’t necessarily about Nikki or written to be sung by someone like her, but there’s a spirit to this music that captures both what the film and the characters are about, I think.”
Today In Madonna History 