A version of Britney Spears hit Womanizer recorded by Lily Allen has hit the net.

The singer has made the track her own shifting the sound from electro-stomp to piano-led gypsy attitude.

The MP3 which has leaked to the web includes an intro by Mark Ronson referencing a blog famous for giving away songs.

He says: "Check me out Stereogum- I have a Lily Allen song you've never heard!"

Allen adds her trademark London accent to the polished hit- which previously featured Britneys heavily auto tuned voice.

Its unclear if Ronson- who doesnt feature on Lilys new album Its Not Me, Its You- produced the track.

Allen releases her new single The Fear in January and is also set to play comeback live-dates.