Simpson, a surprise guest, joined his fellow Kentucky native on Stapleton's "Midnight Train to Memphis'"and "Hard Livin'"
Midland, Old Crow Medicine Show and a special Grand Ole Opry event are also set for the June festival
Singer solicits donations for the ACLU, calling Trump a "fascist f--king pig" during freewheeling performance/Q&A Facebook Live session
Prine named Artist of the Year, Simpson's 'A Sailor's Guide to Earth' wins Album at 16th annual ceremonies in Nashville
Country revolutionary wins over hard-rock crowd with slimmed-down band and big guitars
Singer has been immersing himself in the culture, and sharing it on Instagram, while overseas for Fuji Rock Festival
Simpson, along with David Ferguson, produced the Kentucky singer-songwriter's upcoming debut album, 'Purgatory'
Progressive country singer-songwriter is up for Artist, Album and Song of the Year
Grammy-winning country artist jettisons horn section and bids farewell to longtime lead guitarist in favor of a lean four-piece
Grammy winner follows Eric Church as latest country artist to combat ticket buying bots
Clip features a faceless politician and a border wall breached by a glowing heart doorway
Grammy winner Maren Morris is also on the road, making for a busy late winter on the country circuit
Simpson's 'A Sailor's Guide to Earth' named Best Country Album, while Morris wins Best Country Solo Performance for "My Church"
Backed by Dap-Kings horns, country singer performs a track from Grammy Award-winning 'A Sailor's Guide to Earth'
Grammy-nominated performer resumes his road duties at Florida's Okeechobee Festival on March 4th