Britney's album out in 2011

The "Toxic" singer has started working on new album with producer Max Martin

Britney has started working on a new album, slated for a possible Spring 2011 release.

Her manager, Adam Leber, tweeted, "Britney is working on the new album. It's going incredibly well. Possibly off to best start yet. We have some amazing tracks. No release date set".

The "Toxic" singer is said to be working with producers Max Martin, the man behind hits such as "Baby One More Time" and "Oops...I Did It Again!" and Dr Luke, who's recently worked with Katy Perry, B.O.B., Taio Cruz and Kelly Rowland.

Rumours that Britney is also working with producer William Orbit have surfaced on the internet, but have yet to be denied or confirmed.