Trinny and Susannah in the right jeans

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Look at the difference the right jean makes! Trinny adds a wide belt to cut the size of her butt in half. And her wide-legged jeans balance her figure. "My pear-shaped figure has disappeared in the blink of an eye because I've got the weight of the bottom of my pants," she says.

Susannah's two-toned jeans make her thighs look thinner. They are extra, extra long and the waistline on her pair comes up a bit so her stomach is held in. "You're not seeing all that horrible flesh spilling over the top because the waistband has room for improvement," she says.