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Queen Mathilde of Belgium (C,L) and King Philippe - Filip of Belgium (C,R) pose for the photographer at the Royal Palace in Brussels on May 30, 2017 during a lunch for the jury members of the Queen Elisabeth Cello Competition 2017. / AFP PHOTO / Belga / ERIC LALMAND / Belgium OUT (Photo credit should read ERIC LALMAND/AFP/Getty Images)

Queen Mathilde of Belgium (C,L) and King Philippe - Filip of Belgium (C,R) pose for the photographer at the Royal Palace in Brussels on May 30, 2017 during a lunch for the jury members of the Queen Elisabeth Cello Competition 2017.  / AFP PHOTO / Belga / ERIC LALMAND / Belgium OUT        (Photo credit should read ERIC LALMAND/AFP/Getty Images)

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Queen Mathilde of Belgium and King Philippe - Filip of Belgium (R) walk at the Royal Palace in Brussels on May 30, 2017 during a lunch for the jury members of the Queen Elisabeth Cello Competition 2017. / AFP PHOTO / Belga / ERIC LALMAND / Belgium OUT (Photo credit should read ERIC LALMAND/AFP/Getty Images)

Queen Mathilde of Belgium and King Philippe - Filip of Belgium (R) walk at the Royal Palace in Brussels on May 30, 2017 during a lunch for the jury members of the Queen Elisabeth Cello Competition 2017.  / AFP PHOTO / Belga / ERIC LALMAND / Belgium OUT        (Photo credit should read ERIC LALMAND/AFP/Getty Images)

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BRUSSELS, BELGIUM - MAY 30: Queen Mathilde of Belgium speaks to guests during a lunch for Queen Elisabeth Competition on May 30, 2017 in Brussels, Belgium. (Photo by Olivier Matthys/Getty Images)

BRUSSELS, BELGIUM - MAY 30:  Queen Mathilde of Belgium speaks to guests during a lunch for Queen Elisabeth Competition on May 30, 2017 in Brussels, Belgium.  (Photo by Olivier Matthys/Getty Images)

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BRUSSELS, BELGIUM - MAY 30: Queen Mathilde of Belgium speaks to guests during a lunch for Queen Elisabeth Competition on May 30, 2017 in Brussels, Belgium. (Photo by Olivier Matthys/Getty Images)

BRUSSELS, BELGIUM - MAY 30:  Queen Mathilde of Belgium speaks to guests during a lunch for Queen Elisabeth Competition on May 30, 2017 in Brussels, Belgium.  (Photo by Olivier Matthys/Getty Images)

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BRUSSELS, BELGIUM - MAY 30: Queen Mathilde of Belgium speaks to guests during a lunch for Queen Elisabeth Competition on May 30, 2017 in Brussels, Belgium. (Photo by Olivier Matthys/Getty Images)

BRUSSELS, BELGIUM - MAY 30:  Queen Mathilde of Belgium speaks to guests during a lunch for Queen Elisabeth Competition on May 30, 2017 in Brussels, Belgium.  (Photo by Olivier Matthys/Getty Images)