Who's That Girl? may refer to:
"Who's That Girl" is a song by Swedish pop singer Robyn, written and composed by herself and brother-and-sister production duo The Knife for her self-titled fourth studio album (2005). The track was released as the album's second single in Scandinavia in 2005 (see 2005 in music) and fifth UK single on April 28, 2008 (see 2008 in music).
The track became a minor success on the charts, peaking at number thirty-seven on the Swedish Singles Chart, where it was the third biggest hit from the Robyn album there. In the UK, where the single featured remixes by Seamus Haji, Rex the Dog, and Drop the Lime, "Who's That Girl" reached number twenty-six on the UK Singles Chart.
The song was recorded by Yelle as "Qui est cette fille?" as part of the iTunes Foreign Exchange, where Robyn recorded "À cause des garçons" as "Because of Boys".
No video was shot for the Swedish release of the "Who's That Girl" single. A video was shot for the UK release of the song, and was directed by Diane Martel. It premiered on YouTube on April 8, 2008.
Who's That Girl is a 1987 American romantic comedy film written by Andrew Smith and Ken Finkleman, and directed by James Foley. It stars Madonna and Griffin Dunne, and depicts the story of a street-smart girl who is falsely accused of murdering her boyfriend and is sent to jail. After getting released, she meets a man, who is supposed to make sure she gets on her bus back to Philadelphia, and convinces him to help her catch those responsible for her confinement. While searching for the embezzler, they fall in love with each other.
After the failure of her 1986 film Shanghai Surprise, Madonna decided to sign another comedy film titled Slammer, which was later renamed to Who's That Girl. However, she had to convince both Warner Bros. and the producers of the film that she was ready for the project. Madonna enlisted her friend James Foley to direct the film. Shooting began in New York in October 1986, and continued until March 1987. Production was halted during December due to snowfall in New York. Madonna utilized the time to work on her next tour and the soundtrack of the film.