Singer Michael Buble, left, and comedian Stephen Colbert sing a combined version of the American and Canadian national anthems. (Ian Lindsay / Canwest News Service / MCT)
Singer Michael Buble, left, and comedian Stephen Colbert sing a combined version of the American and Canadian national anthems. (Ian Lindsay / Canwest News Service / MCT)
Singer Michael Buble, left, and comedian Stephen Colbert sing a combined version of the American and Canadian national anthems. (Ian Lindsay / Canwest News Service / MCT)