One of the many highlights was "The Highwayman", where the original performers Willie Nelson and Kris Kristofferson were joined by Shooter Jennings for Waylon's part and Jamey Johnson for Johnny's part.
Here's the tracklist of "We Walk The Line: A Celebration of the Music of Johnny Cash":
01 "Folsom Prison Blues" - Brandi Carlile
02 "Ring of Fire" - Ronnie Dunn
03 "Hey Porter" - Buddy Miller
04 "Hurt" - Lucinda Williams
05 "Wreck of the Old 97" - Rhett Miller
06 "Jackson" - Carolina Chocolate Drops
07 "The Long Black Veil" - Iron & Wine
08 "Big River" - Kris Kristofferson
09 "Why Me Lord" - Shelby Lynne
10 "Help Me Make It Through the Night" - Pat Monahan
11 "It Ain't Me Babe" - Shelby Lynne and Pat Monahan
12 "Sunday Morning Coming Down" - Kris Kristofferson & Jamey Johnson
13 "Get Rhythm" - Andy Grammer
14 "Cocaine Blues" - Shooter Jennings & Amy Nelson
15 "I'm So Lonesome I Could Cry" - Amy Lee
16 "Cry, Cry, Cry" - Sheryl Crow
17 "I Still Miss Someone" - Willie Nelson
18 "If I Were a Carpenter" - Sheryl Crow & Willie Nelson
19 "Highwayman" - Willie Nelson, Kris Kristofferson, Shooter Jennings & Jamey Johnson
20 "I Walk the Line" - all stars