"Baby It's You" is a song written by Burt Bacharach (music), and Luther Dixon (credited as Barney Williams) and Mack David (lyrics). It was recorded by the Shirelles and the Beatles, and became hits for both. The highest-charting version of "Baby It's You" was by the band Smith, who took the song to number five on the US charts in 1969.
The song was produced by Luther Dixon. When released as a single in 1961, the song became very popular, becoming a number three on the R&B chart and peaking at number eight on Billboard's Hot 100 chart. It later appeared on the album Baby It's You, named to capitalize upon the success of the single. The vocal arrangements on this version proved influential in subsequent versions, including that by the Beatles, who used the same one. One notable feature of the song is its minor-to-major key chord changes on the verses.