"Boy (I Need You)" is a song by American singer-songwriter Mariah Carey, taken from her ninth studio album, Charmbracelet (2002). It was written by Carey, Justin Smith, Norman Whitfield and Cameron Giles, and produced by the former and Just Blaze. The song was released as the album's second single on November 26, 2002. Initially, "The One" had been chosen as the second single from the album, however, halfway through the filming of a music video for it, the singer decided to release "Boy (I Need You)" instead. Considered by Carey as one of her favorites, the track is a reworked version of rapper Cam'ron's song "Oh Boy" released earlier that year.

The song was met with generally mixed reviews from contemporary critics. Many praised Carey's versatility and considered it as one of the stand-out tracks of Charmbracelet for having a different production when compared to the others. However, the sample hook of the song was described as "annoying". The single failed to make much impact on the charts around the world; it reached number 68 on the US Billboard Hip-Hop/R&B Songs chart and number 57 on the US Hot Singles Sales chart. Elsewhere, the song reached the top 20 in the United Kingdom, while peaking within the top 40 in Australia, the Netherlands, Ireland and New Zealand.

The music video, directed by Joseph Kahn, incorporates elements of Japanese culture and features Carey's alter-ego Bianca. It was also the first time that Carey worked with Kahn in a music video, which premiered on an episode of MTV's Making the Video in 2003. Following the release of "Through the Rain", Carey embarked on several stateside, European and Asian promotional tours in support of Charmbracelet, as well as its accompanying singles. Carey performed "Boy (I Need You)" live on several television shows appearances around the world. (wiki)