Well, this is no surprise. Chicago rapper Chief Keef has landed himself back in the big house after testing positive for marijuana use. 

Eighteen-year-old Keef -- real name Keith Cozart -- agreed to random drug testing when he pleaded guilty to speeding on a suburban highway earlier this summer. He was previously arrested for smoking pot in an Atlanta hotel room. Hell spend 20 days in jail following his most recent dirty drug test. 

Judging by the teen star's Instagram account we're not surprised to see he's had another pot-related run-in with the law. 

Speaking of Instagram, it's how Cozart chose to announce that he was turning himself in this morning. 

Source: Chicago Tribune 

Photo credit: Getty Images