Ben Harper
Jeff Tweedy
Gregory Alan Isakov x 2
Jim James
Watchhouse x 2
Bruce Hornsby
Margo Price
Joy Oladokun
Colin Meloy of The Decemberists
The Tallest Man on Earth x 2
Waxahatchee
Shovels & Rope
City And Colour
Isaac Slade of the Fray
Jade Bird
Andy Shauf
The Lone Bellow
Jonanthan Russell of The Head and The Heart
Langhorne Slim x 4
Molly Tuttle
Hiss Golden Messenger
Briscoe
Bendigo Fletcher
Rayland Baxter
Buffalo Nichols
Paul Hoffman of Greensky Bluegrass
Josiah Johnson (formerly of The Head & The Heart)
Daniel Rodriguez (formerly of Elephant Revival) x 4
Nicole Atkins
Sunny War
Bedouine
Paper Bird
Adam Aijala & Ben Kaufmann
Otis Taylor
Heavy Gus
Neyla Pekarek (formerly of The Lumineers)
Ben Sollee
Neffy
The Colorado Bluebirds (members of Yonder Mountain String Band, Elephant Revival, and more)
Gasoline Lollipops
Heavy Diamond Ring
Joshua Lee Turner & Bob Barrick
Emelise
The Cody Sisters
Wrenn Van Band
Cole Scheifele
Scott T. Smith
Jonny Miller
Sun Jr.