The tribute concert “Sing Me Back Home: The Music of Merle Haggard” assembled a cross-genre army of Haggard fans to interpret the late country legend’s most famous songs. Keith Richards, John Mellencamp, Billy Gibbons and Lynyrd Skynyrd represented the rock contingent, while Kenny Chesney, Kacey Musgraves, Dierks Bentley and, of course, Haggard’s running buddy Willie Nelson stepped up for country. It was a moving evening full of once-in-a-blue-moon collaborations, even by Nashville standards. The concert, held April 6th, the anniversary of Haggard’s death, was filmed for broadcast on a network and date to be announced, but we already know which performances are the must-sees. Here’s the 10 best things we witnessed at Thursday night’s Haggard blowout.