STOCKHOLM, SWEDEN - APRIL 30: Queen Margrethe II of Denmark arrives at the Royal Palace to attend Te Deum Thanksgiving Service to celebrate the 70th birthday of King Carl Gustaf of Sweden on April 30, 2016 in Stockholm, Sweden. (Photo by Luca Teuchmann/Getty Images)

STOCKHOLM, SWEDEN - APRIL 30:  Queen Margrethe II of Denmark arrives at the Royal Palace to attend Te Deum Thanksgiving Service to celebrate the 70th birthday of King Carl Gustaf of Sweden on April 30, 2016 in Stockholm, Sweden.  (Photo by Luca Teuchmann/Getty Images)