It's not just personal trainers and make-up artists who make these celebs look awesome - these guys have a few health and fitness tricks of their own!
Sharni Vinson eats healthy snacks "I snack on fruit and nuts throughout the day, so I'm not tempted to eat junk food. I love exercising outdoors, like down at the beach, especially in the morning. Then I'm happy for the rest of the day, because I've done something good for my body."
Hilary Duff works out - and feels good about it: "I work out hard and, when I'm finished, I feel good about myself - strong, self-confident and fit."
Vanessa Minnillo exercises self-control: "I'm learning to watch portions. Just because a meal is in front of me, doesn't mean I have to eat it all."
Evangeline Lilly does things in moderation: "I eat well and exercise, and I'm not depriving myself any more. I look better now."
Rachel Bilson listens to her body: "I hate it when people say, 'I don't work out, and I eat whatever I want.' I'm not that person. I eat what I want, but if I start to see a problem, I'll do something about it ... I'll eat healthy for a few weeks."
Cameron Diaz sticks with what works: "My body functions best when I eat consistently. I pretty much eat the same thing every day, for weeks at a time. I can go surfing for four hours and not get hungry, and have the energy I need."
Mischa Barton walks her dog every day: "I'm just active and healthy. I have a little hike that I do every day 'round the house with my dog, which keeps me fit, but it's rare that I get in the mood to go and deliberately exercise - it has to be for a reason."
Mandy Moore hits the sack at a reasonable hour: "I'm an early bird, so lights out for me is 10pm or 10.30pm - if I have it my way. When you feel better about yourself and your body, you walk with a little more confidence and life is good."
Beyoncé gets her groove on: "I dance and run hills."
Christina Milian makes an effort to enjoy exercise: "I like working out. It's something fun for me; like shopping. It's really weird to say that, but I do enjoy it!"
Pippa Black gets her friends onboard: "I get involved in team sports or plan exercise with friends, so it's social and more fun!"
Erin McNaught hits the stairs: "I run up and down the steps at Coogee [in Sydney], four or five times a day, five days a week - there's about 200 steps there. I also do a set of dips, push-ups and crunches, as well."
Jessica Alba lunges all the way to tone town: "Every day, I do 10 minutes on the treadmill, 50 lunges and crunches, and 10 minutes of running."
Amy Smart takes time to breathe: "I take deep, deep breaths. Also,
expressing myself by saying what I'm feeling helps me relieve tension."
Rihanna dances and drinks lots of water: "I do the treadmill when
I can fit it in, and I try to eat healthy. I also have rehearsals a lot, so I'm dancing all the time. I think it's really important to drink lots of water."
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