South Side of Chicago brothers Sayyi and Ro$$ Mac collab on the new single "What We Doin". The song was produced by Grammy-nominated hitmaker Soundz (Foreign– Trey Songz, Throw Sum Mo– Rae Sremmurd/ Nicki Minaj), "What We Doin'" is already gaining traction across the country. Ro$$ stated that he and Sayyi were at his in-house-studio back in Chicago (both home for Christmas). "We had been wanting to get back in the studio together for awhile but our tight schedules never seemed to coincide-- Sayyi was always on the road traveling with Jeremih and I was in NY working," said Ro$$. "So, that night (about 2 days after Christmas) we decided to not go out and instead started going through beats. When we came across this one in particular by Soundz, we knew it was some heat! We just started vibin and it eventually turned into 'What We Doin'," stated Ro$$. Although these two are reppin' Chicago, the song seems to have some dirty south influence. Take a listen below.