By Leah Ornstein - Breaking Celebrity News Style & Beauty Editor

Gunnar Peterson has been training the hottest bodies in Hollywood for several years. Breaking Celebrity News has some exclusive tips from the personal trainer (who is currently kicking Kim Kardashian’s booty into tip-top shape for her upcoming nuptials to Kris Humphries) on how to get in the best shape of your life this summer!

Peterson, who recently hosted the Under A