The death of the French president, Georges Pompidou It was the death of Pompidou. Italy did not broadcast Eurovision that year because of concerns that the entry Sì by Gigliola Cinquetti was an endorsement for voting "yes" in a referendum on divorce happening at the same time. It was Portugal's entry, E Depois do Adeus, which genuinely appears to have been used as part of a signal to start a revolution when it was played on the radio. A dispute with the EBU over the competition being hosted in the UKFrench broadcasters were concerned the entry could be seen as propaganda for a referendum campaign taking place

Source: The Guardian May 21, 2021 09:00 UTC