The Canadian rapper appeared alongside the pop sensation at the Rogers Centre in his hometown at the weekend, surprising the 60,000-strong crowd when he walked on stage to sing Right Here, a track from Justin's Believe album that he features on.
The pair also performed Drake's song The Motto at the venue, which was previously called the SkyDome.
After their performance, Drake put his arm around Justin's shoulders and told the crowd: "I'll tell you, there's very few people I've met in the world that are as talented and as incredible as this young man right here.
"I want to thank you for letting me live a childhood dream, which is my first opportunity to perform at the SkyDome. So thank you, my man."