Geri Halliwell is the envy of every woman in Britain as she flaunts her lithe new figure in San Tropez. Her tiny waist accentuates her perfect boobs, and there's not a trace of cellulite on her taut bottom and legs. In her Spice Girl days, Geri was once ridiculed for being plump.
But she has slimmed from a size 12 to a size 8 - proving that any woman can change her shape, with the help of the right diet and a rigorous exercise plan.
Here we reveal how she got that beautifully-toned look. Geri's holiday companion Robbie Williams watched admiringly when she practised her yoga exercises on the beach.
The 27-year-old star showed how strong and supple she's become by performing bending movements known as the Crab, the Dog, the Cat and the Cobra. Yoga has helped her to get in tune with her body and streamline her figure.
"It keeps me supple and really trim," she says. "I do it as much as I can, and I've lost weight since I started doing it. "It's given me good abdominal definition and it really helps to relax me. It's fantastic - I love it."
Geri was introduced to the ancient Indian art by the private teacher Kisen, whose wealthy clients include Neil Tennant from the Pet Shop Boys and Hollywood actress Elisabeth Shue.
He teaches Ashtanga yoga, which emphasises meditation and breath control rather than the traditional yoga poses. Geri contacted him in desperation in her lowest period after leaving the Spice Girls in 1998 and has been seeing him ever since. She looks to him for spiritual guidance as well as fitness tips.
"The general public has absolutely no idea of the tensions that were placed upon her at that time," says Kisen, 42, whose nickname for Geri is Gingernut. "I've talked to her about slowing down, taking life easier, seeing the beauty in ordinary things. "He has devised an individual fitness plan which has left her leaner, wirier and less bulky.
"It's not about flexibility," he says. "It's about reaching a greater understanding and acceptance of yourself. It is about strength in the service of wisdom." Liverpool-born Kisen says Geri is delighted by the results. He says: "She once called me to say: 'I've just seen my new video and guess what, Kisen? I look like a babe!'
Geri has learned to perfect Kisen's techniques at home, but also attends the Triyoga centre in Primrose Hill, North London, where fellow devotees include actors Jude Law and Sadie Frost.
Simon Low, from the centre, says: "The physical benefits are tremendous and include strengthening the body, improving posture and developing powerful muscles.
"Some people's bodies - like Geri Halliwell's - respond drama-tically and very quickly.
"She is a wonderful advertisement for the benefits of yoga. Not only does she look slim, but also healthy and happy."

GENERAL EXERCISE

Geri supplements her yoga with more conventional ways of keeping fit. She runs up to six miles a day, often with her Norwegian personal trainer and physiotherapist Torje Eike.
"I'm not one of these women who will ever be naturally thin - I really have to work hard at it," says Geri, who varies her routine with swimming, cycling and visits to the gym. Torje, 40, numbers Jerry Hall and her ex-husband Mick Jagger among his clients, and helped Jerry tone up for her nude scene as Mrs Robinson in the West End play The Graduate. He has also trained athletes, ballet stars and footballers.
Torje knows celebrities can rarely go out cycling or running alone and encouraged Geri to buy a bike stand that effectively converts her outdoor bike into an indoor version. He has explained when she should exercise to get maximum results from her programme. Her routine includes warming up, stretching, achieving an aerobic level of exercise, cooling down, strengthening muscles and stretching again.
Torje has taken over from Kenny Goss, George Michael's partner, who helped Geri lose a stone after she left the Spice Girls. She also goes to the Buckinghamshire health club where Mel B works out.

DIET

Geri weighs 7st - within the healthy weight range for a tiny five-footer. In her Spice Girl days, she was at least a stone and a half heavier.
She has recently followed the controversial low-carbohydrate diet favoured by stars such as Jennifer Aniston and Ally McBeal's Calista Flockhart. But she opted for the more moderate Zone version devised by American biotechnologist Dr Barry Sears.
Instead of completely cutting out carbohydrates he recommends a daily food intake of 30 per cent protein, 30 per cent fat and 40 per cent carbohydrate - double the protein and half the carbohydrate that mainstream nutritionists say is healthy.
Strict no-carb dieters would typically eat an egg for breakfast, a rare steak for lunch and grilled chicken for supper. Now on Torje Eike's advice Geri has sensibly included more carbohydrates, seafood and plenty of fruit and vegetables. She says: "If you really want a flat stomach, you've got to make the effort to find a balance and eat a good, varied diet. You can't deny yourself everything, but at the same time you mustn't go overboard on the junk. I try to eat lots of healthy foods such as salads and fish to keep trim, butI do have a sweet tooth and love desserts - especially sticky toffee pudding or anything with chocolate.
"The trick to having a healthy body is to eat what you want, but in moderation."

BEAUTY

The old Geri wouldn't have dreamt of leaving the country without a sackful of make-up. But she has pared down her beauty regime to a minimum to look fresh-faced and much younger. "My must-have product is concealer, which I use to cover up any dark under-eye shadows," she says. "It helps make me look more `alive´ and I also like pink blusher to add a glow to my cheeks."
Geri's skin is radiant, and she looks healthier with a light tan. But there's no doubt her blonde hair extensions demand high maintenance. Specialist hair-care products now fill the space in her suitcase where her make-up used to be. But it's worth a little trouble to complete that fabulous beach babe look.