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LONDON, ENGLAND - AUGUST 03: Catherine, Duchess of Cambridge covers her face as she watches the swimming finals session on Day 7 of the London 2012 Olympic Games at the Aquatics Centre on August 3, 2012 in London, England. (Photo by Adam Pretty/Getty Images)

LONDON, ENGLAND - AUGUST 03:  Catherine, Duchess of Cambridge covers her face as she watches the swimming finals session on Day 7 of the London 2012 Olympic Games at the Aquatics Centre on August 3, 2012 in London, England.  (Photo by Adam Pretty/Getty Images)