Top 6 Most Effective Celebrity Diets

How do red carpet denizens like Victoria Beckham, Katy Perry and Gwyneth Paltrow ward off weight gain? With the health industry's latest guarantees, of course.

By Julie Kosin

The Alkaline Diet: Back in January, Victoria Beckham tweeted a picture of the cookbook Eating the Alkaline Way. "Love this healthy eating cook book!!" she enthused. Clearly, it loves her back; Posh has maintained her signature svelte frame with a diet rich in fruits and vegetables that curtails consumption of acid-forming foods like dairy, pasta, meat and fish. The goal? To keep the body's pH balance between 7.35 and 7.45. Other famous fans of the diet book, penned by Natasha Corrett, the stepsister of Sienna Miller, include Jennifer Aniston, Kirsten Dunst and Gwyneth Paltrow.

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The M-Plan Diet: The secret to Katy Perry's "California Gurl" body? Mushrooms. With the M-Plan diet, Perry eats a mushroom-packed lunch or dinner every day for 14 days, then watches the pounds slip off. Great for removing unwanted bulk from problem areas like the stomach and thighs, the program still allows the dieter to retain her womanly shape-the mushroom meal plan won't effect the bust.

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The 5-Factor Diet: Megan Fox is a huge fan of celebrity trainer Harley Pasternak's 5-Factor Diet, which Eva Mendes, Alicia Keys and Jessica Simpson also swear by. The program encourages dieters to cook with five ingredients or less and follow Pasternak's rigorous exercise regime.

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The Beauty Detox Solution: To shed her baby weight, Drew Barrymore has been using celebrity nutritionist Kimberly Snyder's Beauty Detox Solution. The program, of which Fergie is also a fan, encourages a plant-based diet and lots of juicing.

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Tracy Anderson's Food Program: Celebrity trainer Tracy Anderson recently launched a nationwide food delivery program that guarantees weight loss when combined with Anderson's workout methods. With a menu featuring options like Provençal eggs with eggplant zucchini and coconut flan with mango passion fruit sauce, as well as a separate program for vegetarians, it's no wonder Gwyneth Paltrow and Jennifer Lopez are hooked.

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The Fresh Diet: Christina Aguilera slimmed down with The Fresh Diet, a home delivery meal plan created by a Le Cordon Bleu-trained chef. The program touts a vast menu, with meals like multi-grain strawberry pancakes, mango-stuffed pork loin and key lime cheesecake landing on hungry dieters' doorsteps twice a week.

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