OSLO, NORWAY - MAY 10: Princess Beatrix and Princess Mabel of Orange-Nassau are seen arriving at the Opera House on the occasion of the celebration of King Harald and Queen Sonja of Norway 80th birthdays on May 10, 2017 in Oslo, Norway. (Photo by Rune Hellestad - Corbis/Corbis via Getty Images)
OSLO, NORWAY - MAY 10: Princess Beatrix and Princess Mabel of Orange-Nassau arrive at the Opera House on the ocassion of the celebration of King Harald and Queen Sonja of Norway 80th birthdays on May 10, 2017 in Oslo, Norway. (Photo by Patrick van Katwijk/Getty Images)
