Princess Caroline of Hanover attends a dance show during the traditional Monaco's picnic, on September 10, 2015 at Monaco. / AFP / POOL / VALERY HACHE (Photo credit should read VALERY HACHE/AFP via Getty Images)
Princess Caroline of Monaco and Stefano Casiraghi at the Yves Saint Laurent fashion show in Paris. (Photo by Bertrand Rindoff Petroff/Getty Images)
MONTE-CARLO, MONACO - JUNE 25: 25: 25: Princess Alexandra of Hanover (L) Charlotte Casiraghi (C) and Princess Caroline of Hanover (R) attend the International Monte-Carlo Jumping on June 25, 2010 in Monte-Carlo, Monaco. (Photo by Pascal Le Segretain/Getty Images)
MONACO - JULY 05: Prince Albert II of Monaco with his fiancee Charlene Wittstock, left, and his sister Princess Caroline of Hanover dance during the open-air concert of American blues rock trio, ZZ Top and American singer Iggy Pop, in front of The Prince's Palace of Monaco on July 5, 2010 in Monaco, Monaco. (Photo by Christian Alminana/Getty Images)
PARIS, FRANCE - MARCH 08: Princess Caroline of Monaco arrives at the Chanel show as part of the Paris Fashion Week Womenswear Fall/Winter 2016/2017 on March 8, 2016 in Paris, France. (Photo by Foc Kan/WireImage)
