The self-proclaimed “white boy awesome” Mac Miller. The 18-year-old hip-hop artist, who ranked at No. 50 on Uncharted last month, carved out a spot on not one but two Billboard charts for his track “Knock Knock” last week, at No. 36 on Rap Digital Songs and No. 48 on R&B/Hip-Hop Digital Songs. The up-and-comer recently released a mixtape and is currently on tour with Wiz Khalifa. Get Knock, Knock on itunes now!!!!