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MONACO - JULY 11: Charlotte Casiraghi attends the First Day of the 10th Anniversary on the Throne Celebrations on July 11, 2015 in Monaco, Monaco. (Photo by PLS Pool/Getty Images)

MONACO - JULY 11:  Charlotte Casiraghi attends the First Day of the 10th Anniversary on the Throne Celebrations on July 11, 2015 in Monaco, Monaco.  (Photo by PLS Pool/Getty Images)