Everywhere you look glossies are offering weight loss tips and suggestions. While some seem unobtainable, long time celebrity trainer Gunnar Peterson, who trains everyone from Kim Kardashian and Sofia Vergara, says achieving the perfect body starts with one's self. SOUNDBITE: Gunnar Peterson, trainer, saying (English): "The ones who are at the tops of their field always seem to have that same work ethic. And I think that maybe that's the message." One of the main excuses people give for not working out is 'not having time,' which Peterson says is one of the largest obstacles for his Tinsel town clients. SOUNDBITE: Gunnar Peterson, trainer, saying (English): "Sofia is someone who fits this into an incredible busy schedule. All the people at the top of their game, the biggest challenge is to find a way to fit their exercise program into their schedules." But if time is still a factor pilates might be the way to go, says pilates expert Mari Winsor. SOUNDBITE: Mari Winsor, pilates expert, saying (English): "One of the reasons that a lot of people are drawn to pilates is because they know that it's fast." Winsor, who has a line of successful workout DVDs, has worked with Marisa Tomei, Emma Stone, and recently received attention for helping Miley Cyrus transform her body. SOUNDBITE: Mari Winsor, pilates expert, saying (English): "She wanted to feel like a women, she wanted to change her body, she wanted to have her arms sculpted. Most of all she wanted her tummy sculpted." Model Miranda Kerr combines pilates with other workouts in order to stay in tip-top shape. SOUNDBITE: Miranda Kerr, model, saying (English): "I'm pretty consistent with my yoga, pilates and also resistance training. So I'll workout, all of that, like at least three to four times a week." While soul singer Chaka Khan turned her bed into one of her workout environments. SOUNDBITE: Chaka Khan, singer, saying (English): "My favorite exercise is resistance exercise. Where I have my bands, I can lay in the bed in do them." Although many celebs credit their trainers for their physique, Peterson and Winsor are modest about the praise. SOUNDBITE: Gunnar Peterson, trainer, saying (English): "When I see somebody doing well or getting kudos for it, it's nice to see that the work they've put in is being recognized. But you know, that trophy goes on their mantel, not mine." SOUNDBITE: Mari Winsor, pilates expert, saying (English "It's like being a teacher and watching a student at a spelling bee spelling everything correctly. I mean, they do it, but, you know, they had a little inspiration from the teacher."