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WINDSOR, UNITED KINGDOM - MAY 18: The Queen - Not Amused! - At The Royal Windsor Horse Show In Her 'back Garden' At Windsor Castle. (Photo by Tim Graham/Getty Images)

WINDSOR, UNITED KINGDOM - MAY 18:  The Queen - Not Amused! -  At The Royal Windsor Horse Show In Her 'back Garden' At Windsor Castle.  (Photo by Tim Graham/Getty Images)