NAV, who hails from the Rexdale neighborhood of Toronto, has collaborated with some of Canada’s biggest artists. He boasts production credits on Drake’s memorable 2015 diss, “Back to Back,” and even nabbed a feature from The Weeknd for his new album, 'Bad Habits.' Since NAV is so connected to Canada’s music scene, we recruited the XO signee to give his review on his country’s up-and-coming rappers on the latest episode of 'The Cosign.'