The Extra List: Top 5 Star Diets

Mariah Carey

After giving birth to twins Moroccan and Monroe, the singer lost the 30 pounds of baby weight by using Jenny Craig - and becoming a spokesperson. She told "Extra," "Diet is like 90 percent diet and workout is 10 percent."

Alec Baldwin

The "30 Rock" star dropped 20 pounds in three months, going sugar-free and attending yoga classes with his instructor girlfriend, Hilaria Thomas.

Janet Jackson

After years of yo-yo dieting, Ms. Jackson is looking the best she ever has -- at age 45. Losing 10 pounds in little more than a month without gym workouts. She told "Extra," "I love dance. I love sports, so I have to do it in those ways." She also eats right with Nutrisystem, and is a spokesperson. "It's the easiest thing to do. The food is great."

Kelly Preston and Kirstie Alley

BFFs Preston and Alley both slimmed down this year using Alley's Organic Liaison diet. Check out more infoon Organic Liason [http://www.organicliaison.com/]

Jennifer Lopez

Lopez's rockin' bod is due to the Optimal Cleanse from East West Essentials.The "American Idol" judge said, "My nutritionist loves this, she was like, 'I can't believe you mentioned the Optimal Cleanse!' It's a really good cleanse. This is something that actually cleans out your intestines and everything that builds up, you feel much lighter, and of course, you do drop a few pounds. You can do it for 10 days, but I do it for five days when I feel like I need a break from eating bad."For more information on the Optimal Cleanse, go to EastWestEssentials.com [http://www.eastwestessentials.com/]