Rufus Wainwright, a Canadian-American, sang the National Anthem at Dodger Stadium prior to Game 5 of the World Series.
Mistakes happen, and singing in front of 40,000+ fans can be daunting. However, a correct performance of the Canadian anthem is expected on baseball's grandest stage.
Wainwright surely knows the words or else he wouldn't have volunteered to sing the song in the first place.
Author's summary: Rufus Wainwright faced challenges singing O Canada at the World Series.