I was just browsing through PerezHilton.com and came across something pretty interesting... Britney Spears' newest single.  Click read more to have a listen.

The interesting thing about this is that Britney is not on the track yet!  Don't call me a liar just yet, this is a demo of her new single.  So this isn't the full song and the lead vocal is just a female studio artist at the moment.  PerezHilton.com leaked this a few hours ago and claim that it will eventually be fully produced with Britney's vocals on top and released as a single.  Enjoy!