The OP is ugly for this.
It's very likely that Mary-Kate has relapsed and is dealing, again, with her eating disorder. She looked much healthier just last year(http://images.enstarz.com/data/thumb...hley-olsen.jpg) and it's rude to mock her for it.
That being said- she really has aged like 15 years within the past 4. It's sad, she was so beautiful. Hoping she recovers