18. Marilyn Monroe
The vivacious, flirtatious, and incomparable Marilyn Monroe was known as one of the most beautiful actresses of her time — or of any time, really. She was also born to entertain, especially becoming known for her breathy interpretations of vocal ballads. The most notable of which was "Happy Birthday, Mr. President," which she sang for JFK on the eve of his 45th birthday.
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