I think that some of you are being overly harsh about Hannah's look. Some of that is due to hair, makeup, and camera lighting/angles. A lot of fashion shoots like their models to be androgynous-looking.
That being said, Hannah does seem to have lost a bit of weight. It seems that she wants to be a fashion model, and not just a swimsuit/lingerie model...and they tend to be very thin.
As a fan of her SI material, this does affect what kind of swimsuits that she looks good in now IMHO. For example, she can still rock a two piece that gives her a bit of support, but she didn't look as good in the pics/videos with the see-through black mesh.
She still is very beautiful and one of my favorite models...
