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MONTE-CARLO, MONACO - MARCH 18:(L-R) Pierre Casiraghi, Beatrice Borromeo, 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 Stephane Cardinale - Corbis/Corbis via Getty Images)

MONTE-CARLO, MONACO - MARCH 18:(L-R)   Pierre Casiraghi, Beatrice Borromeo, 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 Stephane Cardinale - Corbis/Corbis via Getty Images)