I know, I automatically assumed it was for something anorexic related too, but it's not. At least not directly anyway. According to People she has Pneumonia:
On Sunday, Richie, 28, said on her Twitter page that she had been battling illness, writing, "ok cold, it's been 6 days. Lets part ways graciously & keep it moving."
I heard from my cousin who is a veterinarian (okay, he just really likes dogs) that when your diet is an apple and a froot loop every day, it makes your immune system work about as much as Kristin Cavallari. So that's probably why she has pneumonia, but who knows?