"Who's That Girl" is a song by Swedish pop singer Robyn, written and composed by herself and sibling production duo The Knife for her self-titled fourth studio album (2005).

[1] In the UK, where the single featured remixes by Seamus Haji, Rex the Dog, and Drop the Lime,[2] "Who's That Girl" reached number twenty-six on the UK Singles Chart.

[1] 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".

A video was shot for the UK release of the song and was directed by Diane Martel.