Britney Spears album 'not done'

Britney Spears new album 'Femme Fatale' is 'not done' according to producer Dr Luke.

Speaking to Rolling Stone, the producer (who co-wrote her new single 'Hold It Against Me') said: '(The album) is not done. We're in the middle of it right now.

'It's a little bit fluid right now. I can't even say at this stage what songs for sure are making it and what songs aren't.'

He went to say: 'We're working with a lot of producers and overseeing it with her A&R and record label and management and trying to make something cohesive.'

Earlier this week Britney Tweeted the title and cover of the album, which is due on March 15th.