MONTE-CARLO, MONACO - MARCH 28: Princess Caroline of Hanover attends the Rose Ball 2015 in aid of the Princess Grace Foundation at Sporting Monte-Carlo on March 28, 2015 in Monte-Carlo, Monaco. (Photo by Pascal Le Segretain/Getty Images)

MONTE-CARLO, MONACO - MARCH 28:  Princess Caroline of Hanover attends the Rose Ball 2015 in aid of the Princess Grace Foundation at Sporting Monte-Carlo on March 28, 2015 in Monte-Carlo, Monaco.  (Photo by Pascal Le Segretain/Getty Images)