Recently Rolling Stone got an all-access pass into the studio to see Kendrick Lamar previewing his song "B*tch Don't Kill My Vibe," for Andre 3000 and Dr. Dre. It sounds like an instant classic and at the end of the video, Lamar gets a stamp of approval from 3 Stacks and Dre. Good Kid, m.A.A.d. City is in stores on October 22. Watch the video above.