Corey Haim
Autopsy results are still pending, but the actor was said to have flu-like symptoms when he died this week at age 38.
Brittany Murphy
The Cluless star passed away in 2009 at the age of 32 of complications from pneumonia and prescription-drug use.
Heath Ledger
The 28-year-old's death in 2008 was labeled an accidental overdose of prescription drugs. He was later recognized with a posthumous Oscar for his work in Dark Knight.
Brad Renfro
An accidental heroin overdose proved fatal for the 25-year-old Apt Pupil star who died in 2008.
River Phoenix
The promising young actor died of a drug overdose in 1993 after a night of partying in Hollywood.
Bruce Lee
The actor and martial arts expert (think an early and more intense Jackie Chan) died at age 32 of mysterious circumstances in 1973.
Brandon Lee
Bruce's son, also an actor, was accidentally shot and killed at age 28 while filming The Crow in 1994.
Chris Farley
Cardiac arrest caused by a drug overdose took the life of the 33-year-old Saturday Night Live funnyman in 1997.
John Belushi
The larger-than-life SNL star was found dead at age 33 at Hollywood's Chateau Marmont hotel in 1982. His death was ruled a drug-related accident.
James Dean
The Rebel Without a Cause star and hearthrob in his day died at the tender age of 24 when his Porsche was involved in a head-on collision in 1955.
Marilyn Monroe
The bombshell blonde's death at age 36 was officially listed as "probably suicide," but conspiracy theorists chalk up the 1962 incident to murder.
See the music stars we've mourned too soon in our Shocking Pop Star Deaths gallery.