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Bad Gastein, AUSTRIA: Dutch Princess Margriet and her husband Prof. Pieter van Vollenhoven slide down the hill, 13 January 2007 in Bad Gastein, Austria. The Princess, her husband, children, spouses and grandchildren attended are a special photoshoot to mark their 40th marriage jubilee. AFP PHOTO / ANP / FRANK VAN BEEK (Photo credit should read FRANK VAN BEEK/AFP/Getty Images)

Bad Gastein, AUSTRIA:  Dutch Princess Margriet and her husband Prof. Pieter van Vollenhoven slide down the hill, 13 January 2007 in Bad Gastein, Austria. The Princess, her husband, children, spouses and grandchildren attended are a special photoshoot to mark their 40th marriage jubilee. AFP PHOTO / ANP / FRANK VAN BEEK  (Photo credit should read FRANK VAN BEEK/AFP/Getty Images)