Britney Spears is working on a "big big big" new song.
The 'Piece of Me' singer is reportedly in the studio working on the follow up to her 2008 album 'Circus' and her manager Adam Leber tweeted to say how excited he is her working on a new track with producers Max Martin and Dr Luke.
He tweeted: "This is my thousandth tweet: Brit is recording a big big BIG new song on Friday with MaxMartin & TheDrLuke. I'm pretty sure it's a smash! (sic)"
Britney has worked with both producers before, with Dr. Luke most recently producing the track 'Circus' from the album of the same name; while Max was behind 'If U Seek Amy' from the same record, as well as some of her biggest hits including '(You Drive Me) Crazy' and 'Oops!... I Did It Again'
Dr. Luke has also recently worked with Katy Perry on her 'Teenage Dream' album.
One new track from Britney, reportedly called 'Pleasure You' was leaked to gossip website Radaronline.com, who described it as "about being submissive, a servant and doing whatever it takes to please her man".
The track was also described as a departure from the dance music influenced sound which Britney has explored on her last two albums.