I'd like to point out one thing (I should of really said this when I originally posted the topic)

I'm know I haven't included other great musical countries (Canada, Australia, Germany, Finland etc.) but me and a friend were having an argument the other day, I said UK, he said US, so I made this poll.

By the way, I also think Feeder are great.
And yes, Avril Lavinge is the worst thing to ever come out of Canada (along with Ice hockey)