I've Just Begun (Having My Fun)

"I've Just Begun (Having My Fun)" is a download-only single from pop singer Britney Spears released on iTunes during the third quarter of 2004.
Originally recorded during the sessions for In the Zone, "I've Just Begun (Having My Fun)" was penned by Spears, and other common collaborators of hers, and was produced by Bloodshy & Avant. The song was originally given away as a free downloadable track that fans could access if they purchased In the Zone at Wal-Mart. It was later also included on the bonus CD for European and Latin American versions of Spears' In the Zone DVD and released worldwide on Greatest Hits: My Prerogative.
The song was released specially in a download-only format in the U.S. in the summer of 2004. It was never promoted with a video or shipped to radio. Though it never appeared on the U.S. charts, it was a digital hit on iTunes, peaking at #4 on the overall charts. Downloads in the UK were strong though. It peaked at #51 on the charts. In Japan, a 1-track Promo CD single was released to help the promotion for Greatest Hits: My Prerogative sales.
To also promote Do Somethin', the song was included as a B-Side on the UK single.