I have at this moment more hours of Canadian music on my computer than American music. It's interesting considering how rare it is to find good Canadian TV and movies that the Canadian music industry is such an embarrassment of riches. My favorite Canadian band (and my favorite band in general) is Arcade Fire, but I realize that's a pretty boilerplate answer and that there are a lot of other good answers to that question.
That's not surprising at all. Almost all movies and TV shows in North America are produced in either Hollywood and if not there NYC, and that's what most of the movies and TV in Canada are from. But it's a lot easier to produce music anywhere.