Her hips are of normal measurements. She posted this picture in order to help other artists, not for people commenting on her appearance. You are drawing her pose not a portrait of herself. If you wanted to comment on people's looks, go ahead and pick up a Vogue magazine.
Not all of the deviations are "art". Stock images are generally made to help create art, they are not art themselves though. Just a study. Therefore I can see no reason to "comment artistically" (whatever that does mean) on many of them. And, if I may ask, what is the difference between "Lovin' the body shape" and "your hips are just great"? The second one is more straightforward, but they both mean exactly the same. By the way, I recommend reading an essay about art on my profile, you can then see my point of view.