On 11 July 2023, British pop singer Robbie Williams gave a concert at LuxExpo The Box in Luxembourg-Kirchberg to celebrate 25th anniversary of his solo career with his fans in the middle of his “XXV Tour 2023” world tour. Hereditary Grand Duke Guillaume, Hereditary Grand Duchess Stephanie, Princess Alexandra and Nicolas Bagory attended the concert. They met with Robbie Williams before the concert.