The organisers hoped things would return to normality by then and went ahead with planning a major gig in September.

German authorities allowed for the event to take place on 4 September. 13,000 fans are expected in Dusseldorf's football stadium to see pop and rock stars including Bryan Adams, Sarah Conner, Rea Garvey, Joris, Michael Mittermaier and BossHoss.

Strict sanitary measures are in place: face masks must be worn at all times and sufficient distance must be maintained between seats. It is the largest event of its kind in Germany since the lockdown.

It may take years before concerts of such size will return to Luxembourg.