One Toronto Blue Jays fan vacationing in Florida got a bit more than they bargained for on a recent trip to watch the team.While the Blue Jays have their home base in Dunedin, Florida, during the spring months, it's not uncommon for fans to travel across the state to see them take on other opponents.And when Robert Guertin decided to take in a Blue Jays game with his wife Linda at the CACTI Park of the Palm Beaches against the Houston Astros last Friday, he suddenly found himself on the field to sing "O Canada."With the couple travelling with a large group of friends to go check out their favourite baseball team, it turned out that the home side didn't exactly have anyone lined up for the Canadian anthem.Given that Toronto is the lone MLB club based in Canada, most part-time anthem singers could go a whole season of games without ever having to sing two songs back-to-back before the first pitch.So an Astros ticket representative offered Guertin's group the shot to perform the Canadi...