Downie was brought onstage during the concert’s encore to help perform Blue Rodeo’s 1992 hit Lost Together. (Watch the emotional clip above.)
Downie has a history of collaborating with The Sadies and recorded the 2014 album And Conquering Sun with the band.
The 52-year-old recently performed at the We Day youth empowerment event at Halifax’s Scotiabank Centre. Organizers announced the surprise performance in a news release, and Downie was quoted as saying he looked forward to the opportunity to connect with young people “passionately working towards a better tomorrow.”
WATCH BELOW: Gord Downie plays surprise concert at Halifax’s We Day event
The Canadian icon revealed in May 2016 that he has glioblastoma, an incurable and rare form of brain cancer.
Many people and organizations have since spent a lot of time on charitable works to raise money for brain cancer research.
Most recently, Kevin Kerr, who runs a company called Epidemic Music Group, created the fundraiser the Longest Concert by Multiple Artists. The 16-day event will raise money and awareness for 16 different charities, including the Gord Downie Fund for Brain Cancer Research and The Gord Downie & Chanie Wenjac Fund. More than 400 performers have already signed on to perform at the concert.
Aside from receiving treatment, the father of four has been busy promoting his Secret Path solo multimedia project, which recounts the life of 12-year-old Chanie Wenjack, who died in 1966 after running away from a residential school.
WATCH BELOW: Gord Downie and the Secret Path
With files from The Canadian Press, Sean Previl and Brent Furdyk