I'm almost 46 and after being 25+ pounds overweight my entire life am now mid 130s and look great because I got off my ass and ate less. And I'm the laziest do-nothing on the planet - it was not an easy thing to do.
If she's fat it's because she's eating more than she's burning off. And it's in her power to change that.
Oh, yes, you're right of course. I was just speaking from my own experience. All my life I never carried any excess weight. I ate all the worst stuff, and never gained a pound. I didn't really "excercise" much, other than the usual activity that everbody does every day. But it never seemed to affect me. Then I turned 40. Over the next couple or few years... things started to turn different. Sure, I had some bad habits... but they had cost me nothing up to then... suddenly those habits started making a difference. The worst part was that then getting smart and cutting back on the calories and carbs only slowed the onset of excess weight and didn't cut it back any anymore. Nowadays... I have to stay on a fairly extreme low-carb, low-calorie diet just to keep from gaining any more. Bodies at different ages have very different chemistry. That's just true.
Hell, if Rush Limbaugh could drop all the weight he has, and he's older than Carrie is, she can do it...if she wants to.
As for hot or not - definitely "not guilty" in all three movies. Amazing to read the backstory of the infamous ROTJ costume...apparently many instances of "wardrobe malfunctions" including exposed cat...