https://en.m.wikipedia.org/wiki/Canadian_content
It's part of the reason why so many artists come out of Canada. Inorder to satisfy the content regulations the government heavily subsidized the arts.
Most of what Celine Dion produced in her career doesn't fit the government approved list of cultural content, so is considered foreign music. Celine Dion, probably Canada's most recognizable voice and signer, signing in French, a language almost exclusively spoken in Canada on the North American continent, isn't considered Canadian culture.
But some recordings from Elvis do count because he happened to record them on Canadian soil. [0]
[0] https://nationalpost.com/news/extremely-canadian-media-that-...
JB, Celine, Brian Adam's etc arguably started because Canada is such a hospitable environment to artists, if they pick up and basically come American... Why should we classify them as Canadian artists? Don't think any of them even live in Canada anymore, can't say I think they do much for the industry. Matt Dusk, CRJ, lightfoot etc keep it real.