(From L) Founder and president of Swisshearts association Stephane Buchs, Laetitia Brodard-Sitre mother of Arthur who died in the fire, co-organizer of the concert Corinne Uzan, Hugues Blatti, father of Luka Blatti, who was severely burned and co-organizer of the concert Olivier Uzan stand on stand at the start of a tribute concert entitled "Au cur de Crans" for the victims of the New Year's Eve bar fire in Crans-Montana, at the Salle Métropole in Lausanne on April 22, 2026. The fire that broke out in the bar "Le Constellation" during New Year celebrations, claimed 41 lives, most of them teenagers, and injured 115 others. (Photo by Fabrice COFFRINI / AFP via Getty Images)

French pop and jazz singer Julie Pietri performs during a tribute concert entitled "Au cur de Crans" for the victims of the New Year's Eve bar fire in Crans-Montana, at the Salle Métropole in Lausanne on April 22, 2026. The fire that broke out in the bar "Le Constellation" during New Year celebrations, claimed 41 lives, most of them teenagers, and injured 115 others. (Photo by Fabrice COFFRINI / AFP via Getty Images)

French singer Jean-Baptiste Guegan, known as the vocal double of Johnny Hallyday, takes part in a tribute concert entitled "Au cur de Crans" for the victims of the New Year's Eve bar fire in Crans-Montana, at the Salle Métropole in Lausanne on April 22, 2026. The fire that broke out in the bar "Le Constellation" during New Year celebrations, claimed 41 lives, most of them teenagers, and injured 115 others. (Photo by Fabrice COFFRINI / AFP via Getty Images)

French singer Jean-Baptiste Guegan, known as the vocal double of Johnny Hallyday, takes part in a tribute concert entitled "Au cur de Crans" for the victims of the New Year's Eve bar fire in Crans-Montana, at the Salle Métropole in Lausanne on April 22, 2026. The fire that broke out in the bar "Le Constellation" during New Year celebrations, claimed 41 lives, most of them teenagers, and injured 115 others. (Photo by Fabrice COFFRINI / AFP via Getty Images)

Artists and organizers stand on stage holding a white rose during a tribute concert entitled "Au cur de Crans" for the victims of the New Year's Eve bar fire in Crans-Montana, at the Salle Métropole in Lausanne on April 22, 2026. The fire that broke out in the bar "Le Constellation" during New Year celebrations, claimed 41 lives, most of them teenagers, and injured 115 others. (Photo by Fabrice COFFRINI / AFP via Getty Images)

French pop and jazz singer Julie Pietri performs during a tribute concert entitled "Au cur de Crans" for the victims of the New Year's Eve bar fire in Crans-Montana, at the Salle Métropole in Lausanne on April 22, 2026. The fire that broke out in the bar "Le Constellation" during New Year celebrations, claimed 41 lives, most of them teenagers, and injured 115 others. (Photo by Fabrice COFFRINI / AFP via Getty Images)

Former bassist and singer of the French group Gold, Alain Llorca performs during a tribute concert entitled "Au cur de Crans" for the victims of the New Year's Eve bar fire in Crans-Montana, at the Salle Métropole in Lausanne on April 22, 2026. The fire that broke out in the bar "Le Constellation" during New Year celebrations, claimed 41 lives, most of them teenagers, and injured 115 others. (Photo by Fabrice COFFRINI / AFP via Getty Images)

Former bassist and singer of the French group Gold, Alain Llorca performs during a tribute concert entitled "Au cur de Crans" for the victims of the New Year's Eve bar fire in Crans-Montana, at the Salle Métropole in Lausanne on April 22, 2026. The fire that broke out in the bar "Le Constellation" during New Year celebrations, claimed 41 lives, most of them teenagers, and injured 115 others. (Photo by Fabrice COFFRINI / AFP via Getty Images)