Question: In 2002, Mariah Carey reworked a song by which Harlem rapper, formerly known as Killa Cam? 

Related documents: [0]  [DOC] "Boy (I Need You)" is a song by American singer and 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 March 24, 2003. 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. [END] 
[1]  [DOC] Cameron Ezike Giles (born February 4, 1976), better known by his stage name Cam'ron (formerly Killa Cam), is an American rapper, actor and entrepreneur from Harlem, New York. He is the "de facto" leader of East Coast hip hop group The Diplomats (also known as Dipset), and is a member of the duo U.N. (Us Now). Cam'ron was also a part of the group Children of the Corn before they disbanded in 1997. [END]  
Answer: Cam'ron
Cam'ron