Entertainment Tonight.

On Wednesday's "The Tyra Banks Show," the supermodel reveals for the first time how she shed weight and got in shape.

"This is not a diet, I do not believe in diets. I have been on diets in the past and they are a bunch of bologna, this is a lifestyle change," she declares. "It's not about being skinny; it's about getting in the best shape that you can be. This is a 'Tyra Show' movement. If I can do it and I love to lay up and not work out, and I love me some BBQ ribs and some ice cream and some Haagen Daaz, if I can do this, you can do this and still eat what you want, just not every second. It is time to get your shape in shape!"

Tyra is dedicating the entire hour of Wednesday's edition of her Emmy-winning show to providing step-by-step tips on her healthy new lifestyle after being inundated with queries as to how she did it.

Wednesday's audience will be filled by fans who wrote in inquiring about her new lifestyle, and she is challenging them to get healthy and fit.

Tyra, who calls her measurements her levels, also says she still has maintained her "34DD boobies and her round booty."

Nutritionist Heather Bauer will join Tyra as they cover it all -- from love 'em and leave 'em carbs to "fiber-licious" foods, even which fast-food choice is the best if you're on the go!

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