It's tough to tell. It's all in the chest.
When you lose too much weight the bones in your chest become visable, your rib cage between your neck and boobs, and you can see visible ribs through the skin because the fat that should be covering them is gone.
She has been wearing quite high clothes and when her chest may be visable she is filtered so heavily it's a struggle to tell.
Her face does have the gaunt look of being underweight with the prominent bones.