Geri Halliwell: Kisen yoga

No one has ever made a dramatic change in body shape work for them quite as artfully as Geri Halliwell. One carefully timed launch of her resculptured bod on an unsuspecting public at the Brit Awards 2001 and Halliwell instantly became much more famous. Yogic guru Kisen is generally credited as the force behind the transformation. He introduced her to the possibilities of ashtanga vinyasa, a power yoga variant, with spectacular effects. Kisen, who claims that the only time you normally notice your body is when you're sick or having sex, has also honed the thighs and abdominals of Lulu, Sam Taylor-Wood, Patrick Cox and Neil Tennant. Geri now raves about yoga, her 'legal drug', and famously launched instruction video Geri Yoga, which has proved mysteriously popular with dads. Geri Yoga, £12.99, from amazon.co.uk