Britney Spears has tweeted that her next album is 'almost done' and will be out in March next year.

Following a couple of tweets thanking her fans for their recent 29th birthday wishes, she wrote "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!"

Then she said she was off for a romantic birthday weekend with Jason Trawick, her former agent.

Not to let the good feeling go on too long, she then followed that up with 'PS - Star Magazine, Radar Online, Jason Alexander and the rest of you liars, Ya'll can kiss my lily white southern Louisiana ass!'

The new album has Max Martin and Dr Luke as executive producers, Dr Luke telling Billboard earlier in the year that he wanted to go for a harder sound; 'maybe a little more deep into electronic ' grimier'.

The album will be her first since 2008's Circus, but she's been keeping her profile up of late, most notably appearing on a Spears-themed episode of Glee, which was the second-highest rated episode in the history of the show.

While you're waiting for Britney's new album, check out the Undercover interview with our own pop princess Jessica Mauboy below.