OLAND, SWEDEN - JULY 14: Princess Madeleine of Sweden and Christopher O'Neill attend a concert to celebrate the 38th birthday of Crown Princess Victoria of Sweden at Borgholm on July 14, 2015 in Oland, Sweden. (Photo by Luca Teuchmann/WireImage)
OLAND, SWEDEN - JULY 14: Princess Madeleine of Sweden and Christopher O'Neill attend a concert to celebrate the 38th birthday of Crown Princess Victoria of Sweden at Borgholm on July 14, 2015 in Oland, Sweden. (Photo by Luca Teuchmann/WireImage)