Marilyn Monroe, 36 Years Old
Norma Jean Mortenson was everyone's It Girl in the 1950s. She was everywhere. A high profile model and actress, she appeared in "The Seven Year Itch" in 1955, and married baseball player Joe DiMaggio. She also had an affair with President John F. Kennedy, so she was rarely out of the spotlight. Her death was ruled as a probable suicide because she had various drugs in her system when she was found.