Keira Knightley has battled allegations that her slight build is due to an eating disorder, and though she has publicly denied having anorexia (if fact, she insists she eats like a horse), speculation has continued. Her mom is now speaking out, saying that Keira eats well and has her father's genes.

Jamie Lee Curtis once again proved to be a breath of fresh air in Hollywood. The actress is turning 50, and at this point in her life, she has come to some realizations about age, body perception, and life in general. Not only is she a class act and a role model -- she's wise, too!

Oprah Winfrey ended her 21-day vegan cleanse, and she says she got out of it exactly what she intended to get out of it -- enlightenment. She kept an online journal of her diet and talked about what she found difficult and what she found surprisingly easy. While the talk show host isn't making any commitments to going vegan, she did say, "I will forever be a more cautious and conscious eater. That's my commitment for now. To stay awakened."

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Kim Cattrall has no problem showing off her body as Samantha Jones in Sex and the City, so you might assume that she has a naturally fabulous figure and that keeping her body perfect would be the most important thing in the world to her. However, the star shared with Good Housekeeping her best beauty secrets, and you might be surprised at what she had to say.

Her secret has nothing to do with painful treatments or fancy workouts. Instead, the 51-year-old star says, "I've exercised and dieted most of my life, because I'm a big girl -- I'm not a tiny little thing. But I've realized that the most important thing I can do to look good is just treat myself well ... Having my priorities in order has really helped me look better, fresher, and more relaxed."

Kim had more to say about age and the SATC movie. To read more, check out the Good Housekeeping article here.

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Shows like Desperate Housewives and Sex and the City have given the world a new way to look at aging. Turning 40 or 50 no longer necessarily means a party with an "Over the Hill" theme -- older men and women can be just as sexy as their much-younger counterparts. And that's a good thing. Right?

Well, yes and no. It's fantastic that we are shedding our stereotypes regarding middle-age, for men as well as for women. Most men would agree that Halle Berry and Heather Locklear are just as sexy as any 20-year-old actress, and men over 40 include George Clooney, Brad Pitt, and Pierce Brosnan -- 'nuf said.

However, eating disorders for adult women are on the rise. We see celebrities like Teri Hatcher, Demi Moore, and Kim Cattrall and while we know that the way they look simply isn't attainable for everyone, it doesn't mean many women don't try by resorting to anorexia or bulimia. Check out our gallery of super sexy celebrities who've celebrated 40 or more birthdays, but use these as inspiration, not for comparison. And, head over to AOL Body to see who they think is over 40 and still smokin' hot!

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Britney Spears has been amazing in a number of ways lately, but most of them have not been positive, to say the least. However, she is apparently amazing her trainer, Marc Corliss, with her dedication. He states that her commitment and attitude are the reasons she's been able to drop 15 pounds in the last four weeks.

Honestly, I would be surprised if she has dropped that much weight -- she is looking healthier, but that's a lot of weight to lose in such a short time. Either way, it's nice to see her smiling, and I'm happy to see that fitness is playing a role in her recovery.

Mario Lopez is sharing his hot body secrets in his book, Mario Lopez's Knockout Fitness, which goes on sale May 13. He's currently out stumping for the book, and while he admits that it's hard to find time for fitness, he believes everyone can achieve their best body. It's certainly helpful for him that his current job requires that he dance all day, but he has some down-to-earth tips -- eat healthy, keep a journal, and stay focused. Sounds like good advice to me!

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