Widespread Panic, John Mayer, Buddy Guy, Emmylou Harris and Arlo Guthrie are among the artists who have been added to the twentieth annual Farm Aid. Held at Chicagos the Tweeter Center in Tinley Park, FarmAid will also feature performances by Kenny Chesney, Wilco, Los Lonely Boys, Buddy Guy and Susan Tedeschi. Inspired by a comment made by Bob Dylan at Live Aid, Farm Aid urges Americans to support food originating from family farms. Farm Aid President Willie Nelson and board members Neil Young, John Mellencamp and Dave Matthews will also perform and likely collaborate throughout the benefit concert.