This is an exclusive world premiere! Ottawa artist Mario Grinds teams up with one of Chicago’s hottest independent rappers Billionaire Black for a hot new single called Don’t Know. This track is a heavy hitting street record that’s going to heat up the summer. It’s about being in the streets so long, you couldn’t tell them something they don’t know. The instrumental is produced by Bxnkroll Beats, one of Toronto’s hottest up and coming producers. Be sure to stream the new single “Don’t Know” below.