Time to bring up The Ox...
"Entwistle died in a hotel room at the Hard Rock Hotel and Casino in Las Vegas on 27 June 2002 one day before the scheduled first show of The Who's 2002 US tour. He had gone to bed that night with a stripper, who woke at 10am to find Entwistle cold and unresponsive. The Las Vegas medical examiner determined that death was due to a heart attack induced by an undetermined amount of cocaine. Though the amount in Entwistle's bloodstream was not great, the drug caused his coronary arteries, already damaged due to a pre-existing heart condition, to contract. Entwistle used cocaine throughout much of his adult life."
That, to me, is pretty much the perfect death for a rock star.