Concert Arrivals - King Carl Gustaf of Sweden Celebrates His 70th Birthday [Getty Images]

STOCKHOLM, SWEDEN - APRIL 29: Eva Maria O'Neill, Princess Madeleine of Sweden and Christopher O'Neill arrive to the Nordic Museum to attend a concert of the Royal Swedish Opera and Stockholm Concert Hall to celebrate the 70th birthday of King Carl Gustaf of Sweden on April 29, 2016 in Stockholm, Sweden. (Photo by Samir Hussein/WireImage)

WireImage Samir Hussein