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OSLO, NORWAY- MAY 17: (NORWAY OUT) Crown Prince Haakon of Norway,Crown Princess Mette-Marit of Norway, and Prince Sverre Magnus, on the balcony of The Royal Palace in Oslo to celebrate Norway's National Day, on May 17, 2016 in Oslo, Norway. (Photo by Julian Parker/UK Press via Getty Images)

OSLO, NORWAY- MAY 17:   (NORWAY OUT) Crown Prince Haakon of Norway,Crown Princess Mette-Marit of Norway, and  Prince Sverre Magnus, on the balcony of The Royal Palace in Oslo to celebrate Norway's National Day, on May 17, 2016 in Oslo, Norway. (Photo by Julian Parker/UK Press via Getty Images)