Arcade Fire and Celine Dion are teaming up to perform at a benefit gig honouring a lighting technician who worked for both acts. Denis Blanchette was the victim of a fatal shooting incident at an election-night party for Canada's Parti Quebecois earlier this month (Sep12). The two Canadian acts will join Patrick Watson and Coeur De Pirate onstage at the Metropolis in Montreal on 1 October (12).