LONDON, UNITED KINGDOM - MARCH 19: Britain's Queen Elizabeth The Queen Mother wears a shamrock corsage as she gives a wave to spectators on hand for the short parade of Irish Guards on The Mall in London 19 March 2000. The Queen Mother now in her centenary year has conducted over the ceremony of the distibution of shamrocks to the Irish Guards on the Sunday nearest St. Patrick's day since 1965. (ELECTRONIC IMAGE) (Photo credit should read JONATHAN UTZ/AFP/Getty Images)

LONDON, UNITED KINGDOM - MARCH 19:  Britain's Queen Elizabeth The Queen Mother wears a shamrock corsage as she gives a wave to spectators on hand for the short parade of Irish Guards on The Mall in London 19 March 2000. The Queen Mother now in her centenary year has conducted over the ceremony of the distibution of shamrocks to the Irish Guards on the Sunday nearest St. Patrick's day since 1965. (ELECTRONIC IMAGE)  (Photo credit should read JONATHAN UTZ/AFP/Getty Images)