Marilyn Monroe is shown wearing a knife-pleated gold gown. She wore this dress in "Gentlemen Prefer Blondes." Monroe passed away a half-century ago this week, a murky death that remains one of Hollywood's most tantalizing mysteries. But look around: Her legend lives on, more vibrantly than ever. In a twist she surely would have appreciated, this 1950's bombshell has become a 21st-century pop culture phenom.