Actress Audrina Patridge blames constant speculation of a breast enlargement on a "chest problem" she has struggled with her whole life.

The former Hills star, 26, has long been dogged by rumors she has gone under the knife to boost her bust, but Patridge insists the apparent changes in the size of her boobs are the result of an unusual deformity.

She insists she doesn't "like to talk about that", but tells TheDaily.com, "Well, see I have this chest problem. My bone right here, it's higher on this side? It's pectoralis something. So I've always struggled with that. You could see they look different sizes (in photos) all the time."

And Patridge is adamant the rest of her body is natural too.

She adds, "They always ask me about that... and there's all these rumors and they all say I've had, like, six (cosmetic) procedures. And I'm, like, 'Where do you get that?' Look at the pictures. I fluctuate in weight a lot. And as far as my face, I'd never had anything done."

Judge for yourself...

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