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Combo picture shows guests wearing hats (From top L) Victoria Beckham, Princess Letizia, Charlene Wittstock, the fiancee of Prince Albert II of Monaco, Crown Princess Victoria of Sweden, Britain's Queen Elizabeth II, Anne, the Princess Royal, Queen Margrethe of Denmark, Queen Sofia of Spain, Carole Middleton, Kate's mother, Princess Beatrice, Princess Eugenie and Camilla, the Duchess of Cornwall arrive for the wedding ceremony of Prince William and Kate Middleton in London on April 29, 2011. AFP PHOTO (Photo credit should read -/AFP/Getty Images)

Combo picture shows guests wearing hats (From top L) Victoria Beckham, Princess Letizia, Charlene Wittstock, the fiancee of Prince Albert II of Monaco, Crown Princess Victoria of Sweden, Britain's Queen Elizabeth II, Anne, the Princess Royal, Queen Margrethe of Denmark, Queen Sofia of Spain, Carole Middleton, Kate's mother, Princess Beatrice, Princess Eugenie and Camilla, the Duchess of Cornwall arrive for the wedding ceremony of Prince William and Kate Middleton in London on April 29, 2011. AFP PHOTO (Photo credit should read -/AFP/Getty Images)