She is a classic starver-binger. One extreme or the other. And being in showbusiness, where appearance is all, has made her chaotic behaviour around food even worse.
It's a shame that she is now famous for being the thin girl that got fat, and not for anything she may or may not have achieved as a singer. But once they start to live their lives in the public eye they seem to go on to do everything in that glaring spotlight. It's like they don't truly live unless they are being photographed, filmed, interviewed, followed around.
She does seem to need proper help with her food and weight issues. But her compulsive overeating is not new to many on this site. Nor is the sheer quantity she can eat. Many of us have been where she is now. It's scary. I hope she gets genuine, practical help. Being held up as the once-beautiful, now sadly let-herself-go poster girl is not going to help her at all.