During a performance at Chicago's Aahh Fest! earlier this evening, Common surprised his hometown with a surprise performance from Kanye West. During his guest appearance, Kanye performed 'Jesus Walks,' 'All Of The Lights,' 'The Good Life' and more. This year's Aahh Fest! also included performances from Dave Chappelle, Lupe Fiasco, Jay Electronica, Lil' Herb and more. Peep this guest appearance and more from the evening below.