Ms. Marnell, right, in February.

xoJane.com beauty writer Cat Marnell has left Jane Pratt's site after refusing to kick her extremely well documented drug habit. The former Lucky beauty editor recently returned from rehab, as mandated by xoJane.com parent company SAY Media, but sources told The New York Post she was still high all the time.

Ms. Marnell wrote Page Six a "Why I Quit" letter so beautiful it really puts that Goldman Sachs guy to shame.

“I’m always on drugs. [...] Look, I couldn’t spend another summer meeting deadlines behind a computer at night when I could be on the rooftop of Le Bain looking for shooting stars and smoking angel dust with my friends and writing a book, which is what I’m doing next. [...] Drug addicts undeniably bring editorial black magic to the table like nobody else, but obviously we make the worst staffers. [...] We can fake it [for a time . . . before we turn into coddled emotional vampire nightmares.”

We miss her already.