ALDERSHOT, ENGLAND - MARCH 17:  Catherine, Duchess of Cambridge holds a glass of Harvey's Bristol Creme in the Junior's Mess as she visits Aldershot Barracks on St Patrick's Day on March 17, 2012 in Aldershot, England. The Duchess presented shamrocks to the Irish Guards at a St Patrick's Day parade during her visit.  (Photo by Chris Jackson - WPA Pool / Getty Images)