With the news that British R&B star and tabloid target Amy Winehouse has died from as yet undisclosed causes, two things are clear: the music world lost one of its most passionately soulful voices, and this is a tragedy that has surprised no one. Winehouse's struggles with drugs and alcohol were often in the public eye and even addressed in her own music, like her best-known hit "Rehab." Throughout her colorful, troubled life, Winehouse fought many demons: addiction, an eating disorder, and a particularly tumultuous love life. Pity Winehouse. The world have just lost one of its talented singers