The best known song by The Guess Who in the United States, yes. The Guess Who first hit top 40 in Canada with 'These Eyes' but didn't reach it in the US until 'American Woman.'

Unrelated, but if I had to pick a song about the US for a 'Quintessentially Canadian' playlist it would be 'The Gulf War Song' by Moxy Fruvous.

Cheers.