We never like to hear of anyone losing their life to drugs. When it comes to Hollywood there have been plenty of lives destroyed and cut short due to drug addiction and abuse. Instead of viewing the entertainment industry to be a place where stars are born and dreams take flight, it has become a realm of destruction and a gateway to addiction for many. Whether it was heroin, cocaine, amphetamines, benzodiazepines or alcohol--these famous personalities left the world and the shining lights to fall into an abyss. Maybe they battled mental illness, health issues, disappointment or professional loss. The glaring headlines and the news of the stars that we lost can be unsettling. We will never know what other roles Marilyn Monroe, John Belushi or Judy Garland would have played. We will never know the songs that Janis Joplin, Jimi Hendrix and Elvis Presley might have written if they had lived. Here are 6 overdoses of celebrity addicts that rocked the world.