This is the third part of my interview with trainer to the stars Gunnar Peterson. He dished about his celebrity clients, gave us tips on working out faster and smarter, and now, we're wrapping up the interview with tips for fitting into that sexy little dress ... by New Year's Eve!

Trying to get ready for a holiday party or hot New Year's Eve date? Gunnar suggests dropping carbs like bread, rice and pasta from your dinner (but don't drop them completely from your diet), getting plenty of sleep, staying hydrated and pushing yourself in your workout with your goal in mind. Fuel yourself for your workouts with some protein a couple of hours beforehand, and stay hydrated throughout your workout -- you'll get more out of it in less time.

If you're going strapless or backless, add some pull-ups into your routine. Gunnar is a big fan of assisted pull-ups using rubber bands, which allow even those who can't do a single pull-up alone to complete several reps. "It gives you a great feeling of accomplishment," he said, "which gets you fired up." Also, throw in some rear shoulder movements, like the reverse fly -- it'll help define muscles and give you better posture.

He might be a tough-as-nails trainer, but Gunnar fully understands the emotional side of fitness. Regarding his clients who really push hard, he said, "Some just have an attittude which makes them predisposed to work hard." But he knows everyone benefits from seeing their accomplishments (and seeing the light at the end of the tunnel). His toughest exercise is "always the last one, often a multi-joint movement, like a squat press and jump. It gets them saying, 'How many more?' which is the literal translation of a groan."

After hearing all this, it's no wonder he keeps Hollywood's elite in top shape. To see Gunnar's TV appearances, read his magazine articles, or just find out more about him, check out his website right here.