Britney Spears' comeback track Womanizer has leaked on to the Internet.

The eagerly anticipated song was set to hit the airwaves in the U.S. next week (beg22Sep08), but has been partly uploaded online and can be heard through Nashville radio station 107.5 The River's website.

According to Usweekly.com, the tune features sexy lyrics, with Spears' singing, "Boy don't try to front/I know just what gets you off".

The song is taken from Spears' forthcoming Lp Circus, which she has hailed as her best work yet, and is slated for a December release to coincide with her 27th birthday.

The album is said to mark a return to form for the pop superstar after a year of erratic behaviour, which came to a shocking end earlier this year (08) as she entered a psychiatric ward and lost custody of her two young sons. (c) WENN