Lil Bibby is firing on all cylinders with every single release he puts outs as the day of his his highly-anticipated mixtape Free Crack gets closer and closer. “Lettin Up” is the newest leak from Bibby and it features his east-side compadre Lil Herb and OTF’s Lil Durk. DJ Victoriouz, DJ Bandz, DJ Twin and DJ Keem unleashed this record via their We Mean Biz Vol. 1 ‘tape (available now), but there’s a real possibility this might end up on Free Crack as well. Peep below.