The Glee star was only 31 when he was discovered in his room at the Fairmont Pacific Rim hotel in Vancouver from an apparent drug overdose.
In the midst of hearing buzz about his portrayal of The Joker in Christopher Nolan's The Dark Knight, Heath Ledger passed away from an apparent overdose of prescription drugs at 28.
A fateful car accident stopped James Dean's rapidly rising career in 1955. At only 24, Dean was posthumously nominated for two Oscars.
The ultimate '50s sex symbol was found dead at her home on August 5, 1962. Monroe starred in such classic films as Some Like It Hot, Gentlemen Prefer Blondes, and The Seven Year Itch.
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River Phoenix was set to star alongside Brad Pitt and Tom Cruise in Interview with the Vampire when he passed away in 1993. The young actor was only 23 and had been nominated for an Oscar for his performance in Running on Empty.
As one of the funniest men in Hollywood, John Belushi's death was a sudden shock in 1982. The star of Animal House and The Blues Brothers was one of the original cast members of Saturday Night Live.
After filming the music video for her song "Rock the Boat," Aaliyah and her entourage flew back to the United States from the Bahamas. Her plane crashed shortly after taking off, killing the young singer/actress and everyone else aboard the plane.
A grisly car accident claimed the life of blonde bombshell Jayne Mansfield. The Playboy Playmate and Golden Globe winner was only 34. Siouxsie and the Banshees' 1991 hit "Kiss Then For Me" was inspired by Mansfield's death.
After finding success with the iconic martial arts movie Enter the Dragon, Bruce Lee suddenly passed away July 20, 1973. The official cause of death for the 32-year-old actor was cerebral edema.