#3 – Cory Monteith
Cory Monteith (May 11th, 1982 – July 13th, 2013) was a Canadian actor and musician, best known for his role as Finn Hudson in the TV series Glee. Known to have had drug abuse problems since the age of 12, he was already in rehab by age 19. Despite seeking treatment for his addiction in March 2013, on July 13th he tragically died of a toxic combination of heroin and alcohol in a Vancouver hotel room, aged just 31.