Oh well, have fun sitting in your seat of judgement.
Even if it turns out the drug addiction took her life, for ME, that doesn't make the event any sadder or less tragic. I don't know what demons she was fighting in her life, but I can at least proffer my empathy for her and her family.
It's a tragic waste to see such a shining star burn out in the way that it did, no matter what the reason. And since I never walked in her shoes, it would behoove me not to judge her, particularly, since I've never lived under the microscope of fame, and I don't know what stresses and demons she dealt with on a day to day basis.
I guess if you've lived a perfect life - then judge away. Otherwise, you might want to look inside your own dirty closet and wonder if you'd want others to judge you the way some of you have judged her.