Troubled singer Amy Winehouse died yesterday. The cause of death is being described as "unexplained," but her history of drug and alcohol problems (which were bad enough to cause her to develop emphysema ) have caused many to snicker as they play a guessing game about how she died. I will admit to even belting-out a few bars to her song Rehab yesterday after hearing of her death. But that sort of mocking has subsided to an overall sadness.