Mac Miller continues to add to his catalog, after dropping his Macadelic mixtape back in March, he now sets to release a collaborative EP alongside producer Pharrell. Earlier today Mac announced via his Twitter that he and P will be dropping their collaborative project titled Pink Slime, and promised to leak a track following #PinkSlime becoming a trending topic. After it trended for a few hours, Miller is now holding up his word and promises fans the first single from off the project titled "Onaroll," which will leak at 3 p.m. EST tomorrow. We recently shared two new tracks Pharrell debuted while in Cannes, one of which featured Miller, so thoughts are the track could be the possible upcoming leak. We'll be sure to keep you up to date as more information is made available, but be sure to check back in tomorrow at the appropriate time to hear their first single.