Denmark's Queen Margrethe (C) greets the crowd from the balcony of Amalienborg Palace on her 75th birthday in Copenhagen April 16, 2015. Also pictured are (L-R) Crown Prince Frederik, Princess Isabella, Crown Princess Mary, Prince Vincent (hidden behind bars), Prince Christian, Prince Nikolai (blue jacket), Prince Felix (brown jacket), Prince Henrik (dark blue jacket), Princess Athena, Prince Joachim and Princess Josephine. [Photo/Agencies]
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