Brandi M. Carlile is an American singer-songwriter and producer whose music spans multiple genres. As of 2018, Carlile has released six studio albums and earned seven Grammy Award nominations, including one for The Firewatcher’s Daughter and six for By the Way, I Forgive You. Wikipedia

The Nitty Gritty Dirt Band played their first gig in 1966 in Southern California as a jug band and by 1969 had become a cornerstone of the burgeoning country-rock community. Their career breakthrough came in 1970 with the release of the record Uncle Charlie & His Dog Teddy and the single “Mr. Bojangles,” a folksy Top 10 pop hit  that remains a staple of their live show. During a tour stop in Nashville around that time, Earl Scruggs and his family came backstage to say hello. That introduction led to a friendship and some of the connections the band needed to record Will the Circle Be Unbroken. That three-disc album brought Nitty Gritty Dirt Band together with a number of country, folk, and bluegrass legends. Heroes like Roy Acuff, Mother Maybelle Carter, Jimmy Martin, Merle Travis, and Doc Watson joined the scruffy, young band to record country music standards such as “I Saw the Light” and “Keep on the Sunnyside.” The acclaimed project is considered a landmark recording in American music.

Following an extended 50th anniversary tour, the ensemble grew to a six-piece in 2018 for the first time since their early jug band days. The group now includes Jeff Hanna (acoustic guitar, electric guitar), Jimmie Fadden (drums, harmonica), Bob Carpenter (keyboards), Jim Photoglo (bass, acoustic guitar), Ross Holmes (fiddle, mandolin), and Jaime Hanna (electric and acoustic guitar). All six members also sing, and when their voices merge, the harmonies add a powerful new component for the legendary band. And with the father-son pairing of Jeff and Jaime Hanna, the band carries on a country music tradition of blood harmony.

Todd Michael “Leon” Bridges is an American soul singer, songwriter and record producer from Fort Worth, Texas. He is best known for his song “Coming Home”, which received regular airplay and was also a Top 10 Most Viral Track on Spotify. Wikipedia

Eric Lindell is an American singer-songwriter. His recording career began in 1996 as a regional Sonoma County-based artist. Since 2006, when he was picked up by Alligator Records, he has toured nationally and internationally. Wikipedia