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MONTE-CARLO, MONACO - MARCH 18: (L-R) Beatrice Borromeo,Pierre Casiraghi, Princess Caroline of Hanover, Karl Lagerfeld and Charlotte Casiraghi attend the Rose Ball 2017 To Benefit The Princess Grace Foundation at Sporting Monte-Carlo on March 18, 2017 in Monte-Carlo, Monaco. (Photo by Pascal Le Segretain/Getty Images)