“I’m a Slave 4 U” parts ways with Spears’s previous singles in a number of ways. It was written and produced by The Neptunes. The song was originally intended for Janet Jackson, who found the song to be too sultry for her vocals and unfit for her album, so The Neptunes offered it to Spears. Many therefore believe it symbolized a change in Spears’s genre of music. Spears said of the song, “It’s talking about me just wanting to go out and forget who I am and dance and have a good time. That’s kinda where I am now right now. I love working, but at the same time, I love having a good time.” Still, it was considered as one of Spears’s signature songs due to the fact that it was a transitional single in her career.

“I’m a Slave 4 U” was later modified as a medley with another Spears song called “Boys (The Co-Ed Remix)” and a dance break mix within “I’m A Slave 4 U” with vocals from Busta Rhymes’ song “Light Your Ass On Fire.” This unreleased medley was used widely in her special performances during the promotion of her succeeding album although she used the album version for the Onyx Hotel Tour. Another medley was also produced using the “Light Your Ass on Fire” remix and the song “…Baby One More Time for Spears’s performance at the 2003 NFL Kickoff.

“I’m a Slave 4 U” is also featured on the video game Boogie, along with another hit single by Spears, “Oops!…I Did It Again”.