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BRUSSELS, BELGIUM - MARCH 30: King Philippe and Queen Mathilde of Belgium attend the annual spring concert at the Royal Palace on March 30, 2022 in Brussels, Belgium. The MP4 quartet offers a program by Franz Schubert, which will be enhanced by interventions of dancers from the 2MAD dance school in Charleroi. The King and Queen wish to dedicate this spring concert to all those who have been involved in the fight against Covid-19 over the past two years. The audience in the Throne Room will therefore be made up of medical and hospital staff, residential care centers, pharmacists, members of provincial crisis units, the police and other institutions. (Photo by Olivier Matthys/Getty Images)

BRUSSELS, BELGIUM - MARCH 30: King Philippe and Queen Mathilde of Belgium attend the annual spring concert at the Royal Palace on March 30, 2022 in Brussels, Belgium. The MP4 quartet offers a program by Franz Schubert, which will be enhanced by interventions of dancers from the 2MAD dance school in Charleroi. The King and Queen wish to dedicate this spring concert to all those who have been involved in the fight against Covid-19 over the past two years. The audience in the Throne Room will therefore be made up of medical and hospital staff, residential care centers, pharmacists, members of provincial crisis units, the police and other institutions. (Photo by Olivier Matthys/Getty Images)
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BRUSSELS, BELGIUM - MARCH 30: King Philippe and Queen Mathilde of Belgium attend the annual spring concert at the Royal Palace on March 30, 2022 in Brussels, Belgium. The MP4 quartet offers a program by Franz Schubert, which will be enhanced by interventions of dancers from the 2MAD dance school in Charleroi. The King and Queen wish to dedicate this spring concert to all those who have been involved in the fight against Covid-19 over the past two years. The audience in the Throne Room will therefore be made up of medical and hospital staff, residential care centers, pharmacists, members of provincial crisis units, the police and other institutions. (Photo by Olivier Matthys/Getty Images)

BRUSSELS, BELGIUM - MARCH 30: King Philippe and Queen Mathilde of Belgium attend the annual spring concert at the Royal Palace on March 30, 2022 in Brussels, Belgium. The MP4 quartet offers a program by Franz Schubert, which will be enhanced by interventions of dancers from the 2MAD dance school in Charleroi. The King and Queen wish to dedicate this spring concert to all those who have been involved in the fight against Covid-19 over the past two years. The audience in the Throne Room will therefore be made up of medical and hospital staff, residential care centers, pharmacists, members of provincial crisis units, the police and other institutions. (Photo by Olivier Matthys/Getty Images)
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BRUSSELS, BELGIUM - MARCH 30: King Philippe of Belgium, Queen Mathilde and Prince Laurent attend the annual spring concert at the Royal Palace on March 30, 2022 in Brussels, Belgium. The MP4 quartet offers a program by Franz Schubert, which will be enhanced by interventions of dancers from the 2MAD dance school in Charleroi. The King and Queen wish to dedicate this spring concert to all those who have been involved in the fight against Covid-19 over the past two years. The audience in the Throne Room will therefore be made up of medical and hospital staff, residential care centers, pharmacists, members of provincial crisis units, the police and other institutions. (Photo by Olivier Matthys/Getty Images)

BRUSSELS, BELGIUM - MARCH 30: King Philippe of Belgium, Queen Mathilde and Prince Laurent attend the annual spring concert at the Royal Palace on March 30, 2022 in Brussels, Belgium. The MP4 quartet offers a program by Franz Schubert, which will be enhanced by interventions of dancers from the 2MAD dance school in Charleroi. The King and Queen wish to dedicate this spring concert to all those who have been involved in the fight against Covid-19 over the past two years. The audience in the Throne Room will therefore be made up of medical and hospital staff, residential care centers, pharmacists, members of provincial crisis units, the police and other institutions. (Photo by Olivier Matthys/Getty Images)
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Getty Images Entertainment Olivier Matthys