[youtube=http://www.youtube.com/watch?v=9uSGqns8nLM] JSWISS performed some joints off of his Awthenticity project last night at the Brooklyn Grind showcase presented by Kelli Sae. Check out his performances of “My Mercedes” and “History” up above. For those in the Philly area, you can pick up tickets to see JSWISS on July 31st here.