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Crown Princess Mary Of Denmark Attend The Tivoli And The Royal Life Guards Celebration Concert For Queen Margrethe Of Denmark'S 70Th Birthday Year At Tivoli Concert Hall, Copenhagen. (Photo by Julian Parker/UK Press via Getty Images)

Crown Princess Mary Of Denmark Attend The Tivoli And The Royal Life Guards Celebration Concert For Queen Margrethe Of Denmark'S 70Th Birthday Year At Tivoli Concert Hall, Copenhagen. (Photo by Julian Parker/UK Press via Getty Images)

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Crown Prince Frederik & Crown Princess Mary Of Denmark Visit The Island Of Bornholm.Visit To Ronne Town Square. . (Photo by Mark Cuthbert/UK Press via Getty Images)

Crown Prince Frederik & Crown Princess Mary Of Denmark Visit The Island Of Bornholm.Visit To Ronne Town Square. . (Photo by Mark Cuthbert/UK Press via Getty Images)

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Danish Crown Prince Frederik and Mary Donaldson arrive to the Danish parliament to attend a reception May 13, 2004 in Copenhagen, Denmark. The couple, who will marry on May 14, met when Donaldson met the heir to one of Europe's oldest monarchies over drinks at the Sydney Olympics, where he was with the Danish sailing team. (Photo by Sean Gallup/Getty Images)

Danish Crown Prince Frederik and Mary Donaldson arrive to the Danish parliament to attend a reception May 13, 2004 in Copenhagen, Denmark. The couple, who will marry on May 14, met when Donaldson met the heir to one of Europe's oldest monarchies over drinks at the Sydney Olympics, where he was with the Danish sailing team.  (Photo by Sean Gallup/Getty Images)