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OSLO, NORWAY - MAY 17: Crown Princess Mette-Marit of Norway, Crown Prince Haakon of Norway, Princess Ingrid Alexandra of Norway and Prince Sverre Magnus of Norway Celebrate National Day In Asker on May 17, 2015 in Oslo, Norway. (Photo by Ragnar Singsaas/Getty Images)

OSLO, NORWAY - MAY 17:  Crown Princess Mette-Marit of Norway, Crown Prince Haakon of Norway, Princess Ingrid Alexandra of Norway and Prince Sverre Magnus of Norway Celebrate National Day In Asker on May 17, 2015 in Oslo, Norway.  (Photo by Ragnar Singsaas/Getty Images)