I think Tyra looks more vibrant and healthy than the social X-rays that Mac_Whore posted. I saw a pic of one of the Olsen twins, recently, and she was so drawn, and her skin stretched so tightly over her bones, I thought she was a post-menopausal woman (I'm not kidding!)
I was commenting to my husband the other day, and have come to the conclusion that the fashion industry is about molding women to look a certain way. And these same people are likely to have poodles with perfect haircuts, and topiary hedging. All these women are to them are topiary meatracks, who have to fit a certain form to carry the clothes. It's very dehumanized.
I think it's so sad that so many young girls (including the rolemodels) don't feel like they measure up. I'm glad Tyra is providing a different perspective. Especially when I see her now, with a really healthy weight and a healthy glow. She looks younger than all the skinny skinny girls in their twenties!