Jessica Simpson's skinny waistJessica Simpson's tiny waistLooking at these pics of Jessica Simpson's waist, a couple of words come to mind.

Much skinnier.

So, is Jessica's waist pulling a magic trick on us and disappearing into thin air?

Well, not exactly.

Jess has been hitting the gym with her personal trainer, Harley Pasternak.

He told In Touch magazine that Jess has shed nearly a stone and a half so far, working out five times a week, with daily sessions lasting forty-five minutes.

He said: "She wants to tone and tighten but not lose her femininity.

"She doesn't want to get skinny and be a twig."

We're glad to hear it, we've always been a fan of her curves.

To see her bod, check out the gallery we put together of her changing shape...