The `Womanizer` singer has been working with producers including Dr. Luke and Max Martin - who have written songs for stars including Katy Perry, NSYNC, Kelly Clarkson, Usher, Kesha and on previous Britneyalbums - on her first tracks since 2008s `Circus`, and said she can`t wait for fans to hear the results.
She tweeted: "I`m almost done with my new album and it will be coming out this March. I AM IN L-O-V-E WITH IT! (sic)."
Songs on the album have yet to be confirmed, but website Radar claimed in October it had heard one track, `Pleasure You`, which it described as "about being submissive, a servant and doing whatever it takes to please her man", and marked a departure from the dance music based sound Britney explored on her last two albums.
British born singer and songwriter Jessie J has also worked on another track - earmarked to be the first single from the album - which she claims will also surprise fans by its sound.
She said earlier this week: "I received the beat to work with and it`s amazing. It`s pretty cool. I don`t think it will be what people expect. "It`s more British than you would expect but with the Britney swag. People will be surprised. It could be the most amazing thing I`ve done."
Britney also tweeted her thanks to fans for their well wishes on her 29th birthday (02.12.10).
She wrote: "Waking up to all of your wishes really made me smile."