When Posh, 33, went out in a grey T-shirt and skirt combination yesterday, she exposed an unflattering blemish on her mid-riff.
Sources speculate the creased belly could be the result of her previous pregnancies – or simply a crease caused by sitting by the catwalk shows.
'Like a lot of mums, she has a few wrinkles on her tummy,' a source tells the Daily Mirror. 'There is no way she's had a tummy tuck or any similar procedure.'
Her spokesman also played down the mark. 'It's nothing more than a rather unflattering crease,' he tells The Sun.
Victoria and hubby David, 32, have 3 sons – Brooklyn, 8, Romeo, 5, and Cruz, 2.
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