In the past, a number of heads of state have marked major events with big names from the world of music. Probably the most legendary performance at a royal event was put on by a rather well-known band from Sweden: ABBA. The wedding was scheduled for 19 June 1976, with the Belgian royal couple and the Grand Ducal couple among the invited guests. A few months after the death of his mother in autumn 2022, King Charles was also the subject of a celebration concert. The celebrations cost $27 million (€23.14 million), according to media reports, with the King of Pop paid a whopping $17 million (€14.57 million).