Demi Lovato, Corey Monteith Demi Lovato, Corey Monteith

Demi Lovato has spoken out on the recent death of Glee star Cory Monteith, who was found dead Saturday from a heroin and alcohol overdose. Lovato, who has also struggled with substance abuse, hopes that the actor's death will help raise awareness of the issue.

Hollywood reacts to Cory Monteith's death

Watch Cory Monteith's final video message to a fan: "Stay out of trouble"