AceShowbiz -

Britney Spears has finally released her highly-anticipated single, called "Womanizer". Debuted on New York's Z100 radio station on September 26, the song is recorded for her forthcoming sixth studio album, "Circus", and scheduled to be released as the lead single of the album, which will hit the stores on December 2.

In related news, Britney is confirmed to perform the tune live on U.K. reality TV show, "The X Factor". A spokesperson from ITV announces, "She will be appearing on the show as a special guest, but we're not confirming the date yet." Previously, the TV show's judge, Simon Cowell says, "We're absolutely thrilled to have her. Everyone wants to work with her because she's a star. She's the number one booking in the world at the moment for a show ... The fact that she goes a bit crazy occasionally makes her more interesting."

The ITV talent contest will enter the "boot camp" phase this weekend on Saturday, September 27. Spice Girls' Emma Bunton, Kimberley Walsh from Girls Aloud, former pop star Sinitta and Westlife's Shane Filan will appear as the show's judge mentors. While Emma is called to assist Dannii Minogue, Kimberly will help new judge Cheryl Cole, and Shane is to advise Louis Walsh.

Audio stream of Britney Spears' "Womanizer":