The surprises are almost expected now.

Canadian rap hero Drake has been known to jump onstage unannounced in support of other artists when they tour through Toronto. He has appeared and performed a song or two at Toronto concerts by J. Cole, Jay-Z, Nicki Minaj, and Bun B in the last few years.

Well, on Friday night Drizzy once again got up to his old tricks.

Harlem's A$AP Rocky, one of the most buzzed-about MCs around, will be opening up for Drake during the chart-topper's tour through the U.S. And on Friday Drake returned the favour by dropping by Rocky's show at The Opera House.

"I'd like to welcome you to the greatest city in the mother****** world!" Drake hollered to the delight of the frenzied crowd. Drake performed "Cameras" and "The Motto" before leaving the stage.

Watch below...