DEPENDENT Amy Winehouse struggled with substance abuse.Credit...Steffen Schmidt/Keystone, via Associated Press Shortly after the singer Amy Winehouse, 27, was found dead in her London home, the airwaves were ringing with her popular hit “Rehab,” a song about her refusal to be treated for drug addiction. The man said “Why you think you here?” I said, “I got no idea.” I’m gonna, gonna lose my baby,
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