Cindy Crawford Reveals Her Favorite Body Part and Why She's Not Phased by Turning 50

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Age is nothing but a number!

Cindy Crawford spoke to ET while promoting her new book, Becoming, and the supermodel revealed everything from how she feels about turning 50, to her favorite body part!

"I would say definitely, as a model, your legs," Cindy revealed about her personal favorite part of her look.

WATCH: Cindy Crawford to Her Model Daughter Kaia: 'Enjoy Carbs While You Can!'

As for the milestone birthday she has coming up in February, Cindy says she's just happy about her life and career.

"When I started modeling, I thought of it as a five year career," she said. "And I kept on tacking on five more years."

"As a woman I don't go, 'Hey, whoopie!' But I'm grateful for my life. It's just a number right."

That it is, Cindy!!

WATCH: Cindy Crawford's Kids Kaia and Presley Gerber Might Just Be the Most Gorgeous Celebrity Kids Ever

Meanwhile, Cindy's 14-year-old daughter Kaia has already a burgeoning modeling career of her own. Cindy revealed to The Edit last week she sometimes worries about the pressures to be thin in modeling today.

"Today, models are expected to be so tiny and I worry about that for her, because that was never my natural body type and I don't think it'll be hers either," Cindy said. "Still, I'll say to her, 'Enjoy carbs while you can!'"

That said, Cindy totally supports her daughter following in her footsteps.

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"Kaia's blossoming into such a beautiful young woman and I really want to let her shine," she continued. "I don't want her to feel in competition with me, although I'll tease her, and say, 'You have my old hair -- give it back!' Or, 'Give me back my legs!' But she'll be fine … She's much more together and worldly than I was at her age."

Watch below.