(L to R) Crown Prince Frederik of Denmark, Prince Albert of Monaco, Crown Princess Mary of Denmark, Dorrit Moussaieff, wife of Icelandic President Olafur Ragnar Grimsson (R) attend the 70th anniversary celebrations for King Carl Gustaf of Sweden in Stockholm on April 30, 2016. / AFP / TT NEWS AGENCY AND TT News Agency / Jessica Gow / Sweden OUT        (Photo credit should read JESSICA GOW/AFP/Getty Images)