I think it's awesome that a person with a completely different style and look - whether she is messed up, on drugs, or drunk, or not at all - can still become such an acclaimed artist. For her music, not for looking "perfect".
Pop stars like Britney Spears (ehh, not anymore, I guess), Christina Aguilera, Beyonce, Mandy Moore, etc, etc, are made to look absolutely perfect... at least in the general public's eyes. But, hopefully, people are getting sick of "perfect", cheesey, unrealistic pop tarts. Admittedly, Amy Winehouse looked MUCH better a few years ago, when she didn't have the drug/whatever problems she has now. But she still looked completely different than your average celebrity, and she still had a lot of talent and uniqueness.
Yes, it isn't ideal that she is doing drugs. But, guess how many celebrities do drugs? A lot. The odds are, your favorite celebrity has done drugs or is currently doing them. It is an almost inevitable part of being famous. At least she IS trying to help herself, at this point. And why is it our business that she is doing whatever she's doing, anyway? Doesn't her ground-breaking music count for anything? IMO, as long as she still rocks it out, I don't care about her personal life.