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The dress worn by Marilyn Monroe when she sang "Happy Birthday Mr. President" to US President John F. Kennedy in May 1962, is displayed in a glass enclosure at Julien's Auction House in Los Angeles, California on November 17, 2016, ahead of its auction this evening. / AFP / Frederic J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP via Getty Images)

The dress worn by Marilyn Monroe when she sang "Happy Birthday Mr. President" to US President John F. Kennedy in May 1962, is displayed in a glass enclosure at Julien's Auction House in Los Angeles, California on November 17, 2016, ahead of its auction this evening. / AFP / Frederic J. BROWN        (Photo credit should read FREDERIC J. BROWN/AFP via Getty Images)