The silence was broken by Quebec-born singer Céline Dion, who stood near a tool kit and gloves in memory of Denis Blanchette, who died when he was shot outside Metropolis on Sept. 4.
Dion's first song, "L'amour existe encore" received a warm applause from the audience.
The impressive list of artists was expanded to include Québécois singer Dumas, Martha Wainwright and Ben Harper.
Ahead of the show, Dion spoke of her desire to help.
"For us to be all together tonight is hopefully going to help to, certainly won't bring it back... But is it ever possible to get together and support and give good strength, positive energy to the family and the poor little child," Dion said. "It's so hard."
Surprise guests were also slated to appear, according to a release by benefit organizer L’Équipe Spectra, the Montreal production company behind events like the Montreal International Jazz Festival.
All profits from the concert will go to the Denis Blanchette trust fund, to help his four-year-old daughter Amy.
Tickets retailed at $80 for standing space, while the 355 seats sold for $175. All concert passes sold within a matter of hours.
Funds will also be collected throughout the night to support Dave Courage, another technician who was injured in the shooting.
Those who wish to make donations but cannot attend the concert are welcome to send money through links on the Metropolis website.