“Who's That Girl” by Madonna

Madonna and Patrick Leonard wrote and produced "Who's That Girl" for the 1987 movie that shares its name, and the song ended up naming the film: it was still being shot as Slammer when Madonna asked Leonard for music that captured her character, and once she had added the words she retitled both the song and the picture. Sire issued it that summer as the soundtrack's lead single.

It's bright, uptempo dance-pop that picks up the Latin-pop thread of "La Isla Bonita", with trumpets in the mix and lyrics that switch between English and Spanish, and the comparisons cut both ways with critics. It still became her sixth number one on the Billboard Hot 100, which at the time gave her more chart-toppers than anyone else in the '80s, went to number one in Britain too, and drew Grammy and Golden Globe nominations.

Written with AI assistance from RockLists chart data, MusicBrainz and Wikipedia.