Britney Spears' is almost unrecognisable in the new promo pics for her album Circus.

The singer is part fantasy princess and part 1920s flapper girl in the latest  set of questionnably flawless photographs to be leaked online.

Britney - who has been working hard to trim down and regain her former glory - is still feeling the strain from last year's very public breakdown.

In a documentary to be shown later this month, the singer is visibly struggling to step back into her former pop princess shoes.

Celebrities Before & After Photoshop

See Britney airbrush the cracks away below