LONDON - JULY 20:   The Duchess of Cambridge's wedding earrings are photographed before they go on display at Buckingham Palace during the annual summer opening on July 20, 2011 in London, England. The diamond earrings were commissioned by the Middleton family as a personal gift to the bride from her parents, ane were worn on her wedding day on April 29 to Prince William, Duke of Cambridge. (Photo by Lewis Whyld/WPA Pool/ Getty Images)