Since the releases of his sophomore album Dark Sky Paradise, Big Sean has enjoyed a successful run in 2015. He has won an MTV Video Music Award and he's being nominated for a Grammy, and not to mention, he's also been on two big tours this year, one with J Cole and the other with Rihanna. Now, the Detroit rapper releases a new song for his fans to show his appreciation. Its called "What A Year" and it features Pharrell Williams and songwriter/producer Detail. Take a listen to Sean below.