Trainers
11) WHO: Gunnar Peterson

TITLE: J.Lo's Butt Man
WHAT: The gung-ho guy who helped craft J.Lo's most celebrated body part and the muscle behind Angelina Jolie's Lara Croft, Peterson is nothing if not dedicated to his job: his home gym, a stunning 5,000-foot complex next to his house that contains a putting green, open-air boxing ring, tread wall, tennis court and 66-foot stair set that's the equivalent of six stories, means that clients get all the benefits of a public gym -- and none of the public.
CELEBRITY CLIENTELE: Jennifer Lopez, Ben Affleck, Sylvester Stallone, Angelina Jolie
CELEBRITY ENDORSEMENT: It follows J.Lo everywhere she goes.
SECRET WEAPON: With Peterson, you never know what to expect: "I've had clients for nine years who have never done the same workout," he reveals.
BUT CAN YOU GET IN? "It's all about scheduling and flexibility," Peterson says, but most of his clients are referrals. He doesn't list his prices but insists that they're "fair."
CONTACT INFO: www.gunnarpeterson.com

12) WHO: Valerie Waters

TITLE: Superhero Creator
WHAT: The perky but tough chick behind Jennifer Garner's celebrated butt-kicking body, Waters is all about efficiency. (She doesn't believe in more than one-hour workouts at a time.)
CELEBRITY CLIENTELE: Jennifer Garner, Cindy Crawford, Kate Beckinsale, James King, Elizabeth Berkeley
CELEBRITY ENDORSEMENT: The perfectly toned Crawford has been with Waters for 13 years -- could you get a better endorsement?
SECRET WEAPON: Warmth. "I'm a drill sergeant but in a loving way," Waters reveals.
BUT CAN YOU GET IN? Though pinning down Waters herself may prove impossible, she has several trainers that work under her. (She's $150 an hour; working out with one of her trainers is $100.)
CONTACT INFO: sportval@hotmail.com or www.valeriewaters.com