Demi Moore, who insists she has never had any plastic surgery whatsoever (apparently she just doesn't age), has recently been caught up in a bit of an airbrushing scandal.

The actress appeared on the cover of America's W magazine and her revealing olive green dress seemed to reveal some heavily retouched hips.

But Demi is seemingly furious about the allegations and even posted the 'original' image on her Twitter page to quash any rumours of airbrushing.

She wrote: "Here is the original image people, my hips were not touched. Don't let these people bulls**t you!"

Now, though, the man who took the pictures has thrown a potentially large spanner in the works by offering up a wager to the Ghost star.

Anthony Citrano, who snapped the pics, has offered £3,125 to Ms Moore's favourite charity if she can prove the online addition is the "original".

Speaking to celebrity blogger Perez Hilton, Citrano said: "I feel bad that Demi is on defence – she should not have to defend other people's mistakes; W Magazine should be addressing this rather than her.

"Having said that, she did raise the stakes considerably yesterday by posting what she claims is the original unretouched shot, along with the accusation that 'these people' (presumably me) are 'bulls*tting'.

"Well, whether or not her hip was botched, I do not believe for a moment that the image Demi posted yesterday is the original shot.

"If she's aware of that – and I expect she is – it's irresponsible (and silly) of her to make that assertion. So, I'll see her move and raise her $5,000: if the shot she posted yesterday is really the unretouched original, I will donate $5,000 to a charity of her choosing.

"Let's see who's 'bulls**tting', shall we?"

We can't wait.

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From Keira Knightley to Gwyneth Paltrow, retouching is all the rage these days. Check out our gallery of celebrity airbrushing madness...