Guest Artist
Porter Wagoner, Nickel Creek, Alison Krauss, David Foster, Sam Bush, Ilya Toshinskiy, Stuart Duncan, Bryan Sutton, Roger Mcguinn, Doctor Ming Wang, Norah Jones, Viktor Krauss, Yusuf, Brenda Lee, George Jones, Kris Kristofferson, Lee Ann Womack, Chris Thile, Tony Rice, Tommy Lee James, Judy Collins
Vocals
Phoebe Cryar, Jeannie Seely, Jan Howard, Jennifer O'brien, Brenda Lee, Yusuf, George Jones, Dan Tyminski, Kris Kristofferson, Jon Mark Ivey, Drew Cline, Joe Nichols, Duane Hamilton, Lisa Bevill, Keith Urban, Jack Green, Mindy Smith, Vicki Hampton, Norah Jones, Mary Hopkin, Pam Tillis, Kathy Stewart, Nickel Creek, Alison Krauss, Danny Roberts, Jamie Johnson, Callie Cryar, George Hamilton IV, Kent Wells, Kim Fleming, Opry Gang, Roger Mcguinn, Chuck Tilley, David Talbot, Jimmy C. Newman, Robert Bailey, Jr., Dolly Parton, Judy Collins, Porter Wagoner, Rhonda Vincent, Mel Mcdaniel, Richard Dennison, Kid Connection Inc., Andy Hall, Anna Wilson, Billy Joe Walker, Jr., Tommy James, Emily Webb, Terry Eldredge, Lisa Cochran, Kristin Bauer, Lee Ann Womack, Angel Cruz