Nas

The Rock the Bells hip-hop tour kicked off a seven-week, 10-city run this weekend at Chicago's First Midwest Bank Amphitheater. Some 25 acts took the stage over 11 bangin' hours, including Nas, Damian Marley, Busta Rhymes, the Roots, K'naan, GZA, Raekwon, Sage Francis, and the Knux. Check out 17 exclusive pics from the show!