"I Belong to Me" is a song by American recording artist Jessica Simpson from her fifth studio album, A Public Affair. The song was written by Diane Warren and produced by Stargate. It was released on September 26, 2006 by Epic Records, as the second single from the album. Originally the song was not included in the standard version of the album, but was released in a version of Walmart as a bonus track. The lyrics of "I Belong to Me" is constructed in verse-chorus format and focuses on the dissatisfaction of love.

The song received mixed reviews, despite the success of previous single "A Public Affair". In the United States, the single reached number 10 on the Bubbling Under Hot 100 Singles and at number ninety-nine the Billboard Pop 100.

After finishing with the process of promoting the movie The Dukes of Hazzard, in late 2005, and in the midst of pain of separation with Nick Lachey, her husband at the time, Simpson told MTV beginning in the process of preparation of their fifth studio album. In mid January, the album begins to walk up, unlike their last album which was full of pop ballads, this would be more mobile and with a little disco similar to those of the 1980s.

"I Belong To Me" was recorded in March 2006, was not included in the final cut of the album songs, however Walmart launched a new version of the album where this was included as a bonus track, because the label, I think the song had great potential as future success. In August 2006, Simpson fans could listen on its official website the songs, "B.O.Y.", "I Belong to Me", "I Don't Want to Care", "If You Were Mine", "The Lover in Me" and "You Spin Me Round (Like a Record)" and vote for the song that would become the second single. It was reported in early September that Simpson had chosen "I Belong to Me" as the second single.

When asked in an interview whether she had written songs that were reflective of her life, Diane Warren named "I Belong to Me", saying "that's one of the closer songs to me, because I feel that. I don't need someone to complete me. I complete myself. I don't believe that you need a person to complete you. That's my philosophy." Simpson said of the song, "It's a very powerful statement ... about owning yourself and controlling yourself. It's part of evolving, of growing up and becoming a woman."

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