Even trim, tones Jennifer Lopez, 44, admits it’s easy to overindulge this time of year. So with access to top nutritionists and trainers, J. Lo and her fellow A-listers use an arsenal of stay-slim strategies to avoid piling on pounds during party season. Here are some of their secrets.

1. Don’t Fast Before a Bash
“Not eating slows metabolism, increases stress hormones and disrupts your digestions.” Says heather Wilson of East West Essentials, a wellness company whose products J. Lo uses.

2. BYO Food
When attending a party in someone’s home, take along a healthy dish. “The hose will love it and you’ll have something to fill up on,” notes Wilson

3. Hydrate
“Strive for nine cups of water a day,” urges Kim Kardashian, who shed 50 pounds of baby weight. “You’d be surprised at the difference!”

4. Sip Smart
J. Lo isn’t a big drinker, but if you like to imbibe at parties, “organic wine is the best,” says Wilson. “Top-shelf alcohol is also good. It has fewer chemicals so it’s easier for the body to process.”

5. Just Say No
Tell a food-pushing hostess a little white lie, celebrity nutritionist Jackie Keller advises Life & Style. Such as? “I’m so glad I could make it but I’m still recovering from a stomach bug.” Works every time!

6. Take Enzymes
Banish bloat with papaya enzyme tablets available at the drugstore.

7. Avoid Gluten
It’s often genetically modified, which slows down metabolism says Wilson.

8. Move On
If you overdo it at an event, don’t starve yourself the next day suggests Skinnygirl’s Bethenny Frankel: “Eat light and focus on vegetables and whole grains to feel better.”

Have an Affair to Remember, Not Regret

Breakfast
Smoothie made from East West Essentials Optimal Protein Poweder, 1/2 cup rice milk, 1/2 cup frozen fruit, 1/4 cup Greek yogurt.

J.Lo's protein smoothies "kick-start metabolism," says nutrion expert Heather Wilson.

-Steel-cut oatmeal (1/2 cup) with 1/2 cup rice milk, 1/2 sliced peach and walnuts.
-Brown rice tortilla, two egg whites and three strips of turkey and three strips of turkey bacon with salsa.

Lunch
Chicken and Asian pear salad--mixed greens with organic chicken, chopped Asian pear, cucumbers and onions.

"Fiber-packed Asian pears are high in pectin, which stimulates calorie burn," advises Wilson.

-Aparagus soup puree (1 cup) topped with goat cheese, rice crackers
-Grilled salmon with 1 cup asparagus (high in potassium to reduce belly fat and build muscle)

Party
One glass sparkling water to start. Five small meatballs, five to 10 steamed shrimp, unlimited salad or raw veggies (dark colors are best)

"Protein curbs appetite," says Wilson. "Veggies and low-cal,filling and balance blood sugar."

-Sliced lean sirloin steak, unlimited cooked green veggies topped with goat cheese
-Chicken skewers, nuts and unlimited raw veggies with 1/2 cup hummus

Snack
Power cake: one rice cake spread with 2 tbsp. sunflower seed butter, topped with a handful of mixed berries

Nuts and seed butters are rich in satiating omega-3s, which stave off hunger.

-Celery sticks with almond butter, carob chips and coconut flakes
-East West Essentials Optimal Cleanse Shake
-Flat belly tea brewed with whole sliced lemon, cayenne pepper, Stevia