Jen Aniston
Secret: hatha yoga
JEN does four sessions of Hatha a week, with personal trainer Mandy Ingber, with 20 minutes of cardio prior to each yoga workout. “I’ve noticed my legs getting leaner, my arms getting stronger. I’ve maybe even grown half an inch from aligning my spine,” says Jen.

Elle MacPherson
Secret: vary your workouts
“I try to put aside an hour a day, five days a week, to do some sort of physical exercise, whether it’s Pilates or running in the park,” says the super. “Sometimes I need to run, other times to meditate or to dance with my kids.”

Cheryl Cole
Secret: Have A Cheat Day
“I still believe you should pig out once a week,” says Cheryl. “I usually do it on a Sunday because that’s also my hangover day.”

Paris Hilton
Secret: drink water before a meal
Paris orders a mineral water before every meal, which, according to diet boffins, means she’ll eat 13 per cent less.

Britney Spears
Secret: sugar ban
Brit got her banging bikini bod back by cutting out sugars. “I try to consume just 1,200 calories a day,” says Brit. “I have no sugar. I don’t even eat fruit or drink fruit juices because of the sugar content.”

Angelina Jolie
Secret: hoodia
Super svelte Ange is rumoured to have used natural appetite suppressant Hoodia to drop 11 kilos of baby weight last summer. The slimming extract causes your brain to think you’re full, eliminating your desire to eat.

Nadine Coyle
Secret: cheat at breakfast
“For breakfast I think you can have whatever you want – I don’t think you should stick to rabbit food all day,” say Nadine. “Plus, you’ve got all day to burn it off. Then salads for lunch and dinner.”

Victoria Beckham
Secret: eat ‘good’ carbs
Vic has stepped up her carb intake since joining a Dhs6,000 a month private members gym in LA. “She normally doesn’t touch carbs,” spilled a pal. “But she’s eating more wholegrains because she’s working out.”

Jessica Alba
Secret: wii fit
“I play all of the Wii Sports games, like bowling, tennis, and baseball,” says Jess, who boats a 25-inch waist. While her personal trainer Ramona Braganza adds, “She also loves riding the bike while she’s watching TV or reading.”

Dita Von Teese
Secret: trampoline
“I’m not a big dieter. I exercise a lot. I have one of those miniature trampolines so I enjoy bouncing up and down on those. That’s when I try to watch movies,” says Dita.

Katherine Heigl
Secret: five-factor diet
Kath swears by the low GI Five-Factor plan, where you eat five meals daily. “Not only will you start losing weight, but you’ll feel less hungry throughout the day,” says creator, LA trainer Harley Pasternak.

Nicole Scherzinger
Secret: satisfy your sweet tooth
“When I want chocolate I just have a little piece, I don’t have to have a huge chocolate cake to satisfy my craving. That’s the trick,” says the PCD.

Jessica Biel
Secret: be adventurous
“She’s game for anything,” says personal trainer Valerie Waters. “She’ll do 10 reps of standing on one foot doing a single leg squat.”

Cameron Diaz
Secret: half portions
“I love my food. I eat burgers,” says surf-fan Cam. “But what I do, is I’ll have a half order. I’m like the leftover queen, though. I love leftovers.”

Scarlett Johansson
Secret: boxing
ScarJo concentrates on cardio activities, like boxing, and avoids weights to keep her figure curvy, without adding bulk.

Beyonce
Secret: eat the right fats
“I go through agonies to keep my stomach as flat as possible, though it is never flat enough for me,” says B, who eats heaps of monounsaturated fats like nuts, seeds, oily fish and avocados, to keep her tum flat.

Katy Perry
Secret: skipping
“I hate working out, but I love jumping rope. I think it’s like dancing. There’s a rhythm,” says Katy. “I’m a really good rope jumper. I can double jump, I can cross, I can do all of it. I look like Rocky!”

Pamela Anderson
Secret: brush your teeth
“I have one tip I always try and do. If I feel really hungry, like I’m craving junk food, I brush my teeth,” says Pammie. “I also do it before I get the kids their meals to stop me picking.”

Kim Kardashian
Secret: snatch exercise time
“I travel a lot, so often I’m without a gym and it’s difficult to keep up the momentum and dedication. Many times I have nothing but a hotel chair in my room but I realised that you can actually exercise anywhere,” says Kim.

Lauren Conrad
Secret: carb-dodging
“If I need to lose weight, I just have to cut out the carbs,” says LC.

Ali Larter
Secret: work harder, eat more
“I eat and that’s why I go to the gym,” says The Heroes star. “I think that some girls just eat a little bit and don’t go to the gym, but for me I love running, I love spinning, I love doing yoga, but I’m also a cook.

Jennifer Lopez
Secret: kettlebells
J-Lo got her post-baby body back with the help of kettlebells – a weighted ball with a handle, which builds strength, improves balance and overall fitness.

Kate Beckinsale
Secret: 8 hours sleep
“Sleep is like the Holy Grail,” says Kate “My trainer says that if you’re tired, your workout will suffer. Sleep is magic stuff.”

Fergie
Secret: vinegar
“I do organic vinegar shots,” says Fergie. “Two tablespoons after lunch and dinner. It helps take toxins out of your body.”

Gwyneth Paltrow
Secret: Dance
“[When] I first started working with her - bless her heart - it was like, ‘Step, touch! Step, touch!’ Now she’s a pop star; she could go on tour herself if she wanted to!” says Gwyn’s dance trainer Tracy Anderson.