Gretchen Wilson has joined the lineup for the Farm Aid concert in St. Louis on Oct. 4. Wilson is a native of Pocahontas, Ill., which is about 40 miles northeast of St. Louis. Other newly-added performers include Billy Joe Shaver, Will Dailey, Ernie Isley & the Jam Band, Ryan Bingham & the Dead Horses, the Blackwood Quartet, Lukas Nelson & Promise of the Real and Titty Bingo. As previously announced, the concert will also feature Farm Aid board members Willie Nelson, Neil Young, John Mellencamp and Dave Matthews, as well as Jamey Johnson, Jason Mraz, Phosphorescent and Wilco. Proceeds will benefit family farmers.