OK, so it's written for Ontario, Canada - but I can't see why the folks of Ontario, Oregon USA couldn't sing a version of Ontari-ari-ari-o when they feel like it. :) Follow the link from Dewey's Treehouse for the video.
For those of you who are wondering, it's my understanding that Ontario, Oregon, was named after Ontario, Canada, after the four founders of the town drew lots to see who would get the honor of naming the place. The winner's name was James W. Virtue, and I understand he was French-Canadian by birth.
P.S. Congratulations to Dewey's Treehouse for winning the Cyberbuddy category in the Homeschool Blog Awards.