"All The Things She Said" is a song performed by Russian recording duo t.A.T.u., released as the lead single from their debut studio album 200 km/h in the Wrong Lane (2002). The song was written, including musical composition, by Sergio Galoyan, Trevor Horn, Martin Kierszenbaum, Elena Kiper and Valeriy Polienko, with production handled by Horn. It was announced by producers of Interscope that they would be recording the song after the split with Russian act Neposedi. The song was then the musical act's first English-language song for the record label, Interscope Records, a subsidiary label of the Universal Music Group, and emerged at a period in time when the duo was entering into the English-language market through a number of developing projects^{[citation needed]}.

Musically, "All The Things She Said" is a mid-tempo pop rock song that draws influences of electronica, europop, R&B and hard rock music. Lyrically, the song is about the relationship between the two girls (whether it is platonic or not is not mentioned) and how they cannot get the other girl out of their heads. The song received mixed reviews from music critics, with some reviews pointing to the song as an album highlight and catchy, but some critics criticized the song's overly-repetitive nature. Following the release of "All The Things She Said", the song had peaked at number one in most charts around the world, including including Australia, New Zealand, Russia, Denmark, Italy, Switzerland and the United Kingdom. The song managed to dominate the charts in the American market, peaking at number twenty on the U.S. Billboard Hot 100.