LUXEMBOURG - JUNE 23: Prince Sebastien, Princess Alexandra of Luxembourg celebrate National Day 2 at Philarmonie on June 23, 2016 in Luxembourg, Luxembourg. (Photo by Sylvain Lefevre/Getty Images)
LUXEMBOURG - JUNE 23: Prince Sebastien, Princess Alexandra of Luxembourg celebrate National Day 2 at Philarmonie on June 23, 2016 in Luxembourg, Luxembourg. (Photo by Sylvain Lefevre/Getty Images)