The Canadian tenor is a popular vocal trawler, similar to other major tenor groups in the world. Also, the singers are big fans of their Canadian compatriot Celine Dion. When they were guests of Oprah Winfrey in 2010, she gave the group a special surprise. As the four men sing Leonard Cohen’s Hallelujah in front of the audience, Dion sneaks up behind them (on stage 3:19).
The four did not at first understand what was happening, but when they realized that their idol was on stage with them, it took all their professionalism to overcome the trauma and continue performing. I especially liked the look on the guitarist’s face when she met Dion!