The Jonas Brothers are one of the hottest acts around, with a huge amount of influence on teens and tweens, which is why the fact that they're actively talking about diabetes is such a big deal. Nick Jonas was diagnosed a couple of years ago, and instead of letting him get down about it, the brothers have used it as a platform to help others. That rocks!

Kate Hudson tends to look fabulous in whatever she wears -- haute couture, jeans and a tee, or a bikini. She doesn't just rely on genetics to keep her looking hot, though -- she incorporates all kinds of workouts into her fitness routine to stay in shape.

Everyone needs a way to get rid of their stress, and Raven-Symone is no different. The actress relies on boxing to keep her self-proclaimed "anger issues" at bay.
While he might be one of the most recognizable athletes in the world today, David Beckham wasn't always so popular. As a kid, he was told that he was too small and would never be strong enough. Now, not only is he an incredibly successful soccer player -- he even still loves the game!

So You Think You Can Dance judge Mary Murphy is rather famous for her screams and appointments to "the hot tamale train," but she's gaining attention for something else -- her recent dramatic weight-loss. And we know how she did it!

Alanis Morissette has an unusually healthy attitude about aging -- she says she enjoys "watching it unfold." I can't imagine what kind of self confidence that must take in Hollywood. Or anywhere, for that matter. But, it's great to see a celebrity embracing the changes that come with time.

Janet Jackson is facing a problem that's all too familiar to many of us -- she's been trying to lose some weight for her world tour (okay, that's not the part we're familiar with), and her man, Jermaine Dupri, keeps stocking her refrigerator with junk food. Her weight has always yo-yo'd a bit, and we wish her the best in reaching her goal. At least she seems to be going about it healthfully!