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WINDSOR, ENGLAND - APRIL 20: Queen Elizabeth II leaves after attending the Easter Matins at St George's Chapel in Windsor Castle on April 20, 2014 in Windsor, England. Her Majesty Queen Elizabeth II will celebrate her 88th birthday tomorrow which will be marked with gun salutes in central London at midday. (Photo by Paul Hackett - WPA Pool /Getty Images)

WINDSOR, ENGLAND - APRIL 20:   Queen Elizabeth II leaves after attending the Easter Matins at St George's Chapel in Windsor Castle on April 20, 2014 in Windsor, England. Her Majesty Queen Elizabeth II will celebrate her 88th birthday tomorrow which will be marked with gun salutes in central London at midday.   (Photo by Paul Hackett - WPA Pool /Getty Images)