By Debbie Emery - Breaking Celebrity News Reporter

Known as the best trainer in Los Angeles, fitness guru Gunnar Peterson has kicked the bodies of Hollywood’s hottest stars and the sports world’s top athletes into shape, and he is now sharing his secrets with Breaking Celebrity News in an exclusive video interview to celebrate the launch of his new online workout program, The Gunnar Challenge.

“Everything on the program is taken from the workouts I do in the gym with every pro athlete and every A-list celebrity,” Peterson told Breaking Celebrity News in an exclusive interview.

“Whatever they do in the gym you’ll be doing in the challenge, and in the same place because we’ll be filming it in the gym. You’re having everything they have.”

Among the dedicated celebs who flock to Peterson’s exclusive private Beverly Hills gym to be put through their paces are Kim Kardashian, Jennifer Lopez, Ryan Seacrest, Sofia Vergara, Tom Brady and Gisele Bundchen.

“It’s hard to say what the stars’ favorite moves are as we do one thing and then are on to the next, but Kim is an incredibly hard worker,” he revealed.  “She shows up, does the work, she makes time. She come right from the airport to the gym. She is no stranger to 6 a.m. workouts.

“I worked with Jen (Lopez) for 13 years. Again, it is about