SARAH JESSICA PARKER'S BICEPS

"Do some curl exercises with weights, but then change it up and use a towel and resist it," Kupris says. "Push a towel with your foot and resist, curling it with your hands and pushing down harder with your leg as you're still trying to curl it up with you arm. It just helps lengthen out those muscles and tone them up really good."

J.LO's GLUTES

Local personal trainer Juris Kupris knows how you can firm up your butt and look cute doing it — the curtsy lunge. "You're basically crossing one leg back, just like a curtsy, and bending the back knee down to the ground," he says. "That really gets into the glute area." Just hold the back foot on its toes, and lower that knee into a lunge a few inches from the ground while you hold the one in the front still. Then push up from your heel.