Madonna reached No. 1 on the U.S.
Billboard Hot 100 with “Who's That Girl”, her sixth U.S. No. 1 single and also a No. 1 hit in the United Kingdom. It was a Spanish-English song with the refrain “¿Quién es esta niña?” and the title track of the soundtrack album to the comedy film of the same name, in which Madonna starred alongside Griffin Dunne.