Back in 2010, the Canadian Tenors appeared on The Oprah Winfrey Show to perform “Hallelujah” by Leonard Cohen. The Tenors are a popular, platinum-selling vocal quartet. Like many professional singers, they idolize Céline Dion. So, you can imagine their surprise when Céline Dion herself secretly planned to walk on stage during their performance to join them in singing the classic song. The results of the impromptu duet were completely spectacular.

The surprise performance was included in a documentary about the superstar’s life, entitled “Céline Through The Eyes of the World.” Along the way, she made a very special pitstop to Oprah’s show to perform with the unknowing vocal group — and the guys had no clue their favorite singer was about to sneak out on stage from the back curtain. Their reaction is certainly one of shock, awe, and admiration but the Tenors do a fantastic job of continuing their performance without missing a beat. It’s hard to believe this was completely unrehearsed.

This is definitely one of the most special performances we’ve seen in a very long time.