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Hollywood's Most Daring Vintage Fashion Moments

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27. Marilyn Monroe's "Happy Birthday" Dress
While Monroe's halter dress is iconic, her second most buzzed about frock was the "Happy Birthday" dress.

The actor wore a nude-colored gown with 2,500 hand-stitched crystals to breathlessly sing  "Happy Birthday" to President John F. Kennedy in May 1962 at Madison Square Garden. She was reportedly stitched into it to make it as body-hugging as possible, giving the appearance that she wore nothing but diamonds on stage.