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Hollywood’s Hottest Celebrity Trainers

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They've bossed around the best in the biz, and now they're taking Us Weekly behind the scenes with the fitness-trainer bodies that sculpt, tone, and slim down the top celebrity bodies. (From left to right: Cara Castronuova, Harley Pasternak, Tracy Anderson, and Gunnar Peterson.)


It's easy to train people, but difficult to motivate them," says the Biggest Loser coach, 31. "I'll sit for hours thinking of ways to keep exercise interesting." But there's a huge payoff: "Being able to change
someone's life is the best. Plus, my job motivates me to stay in shape!"


"What I do is systematic," says the pro and dietitian, 36, whose Five-Factor plan (five weekly workouts and five daily mini-meals) has helped Katy Perry, Megan Fox and Amanda Seyfried stay slim. "And I'm the guinea pig." His one indulgence? Nutella!


This get-fit guru loves her job so much she cries about it! "When I can transform someone, I get happy tears," confesses the former ballerina, 36, whose dance and toning program took Hollywood by storm. (Clients include Gwyneth Paltrow, Kim Kardashian, Courteney Cox, Gisele Bündchen and Julianne Hough.) Of her tendency to befriend clients, she says, "I'm a teacher first. But sometimes that's hard!"


Meeting clients for sessions starting at 3 a.m. doesn't faze this Core Secrets creator, 48. "I'm cool with the hours," says the trainer to Sofia Vergara, Halle Berry, Jennifer Hudson and Gwen Stefani. Besides, it comes with a bonus: "Being up close with people who have risen to the top of their field is fun," he says. "You learn the secrets to their success!"

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