This coming Sunday at 9 PM, NBC will air the 2-hour Elvis All-Star Tribute featuring performances by Yolanda Adams, Kelsea Ballerini, Dierks Bentley, Alessia Cara, Mac Davis, John Fogerty, Josh Groban, Adam Lambert, John Legend, Little Big Town, Jennifer Lopez, Post Malone, Shawn Mendes, Pistol Annies, Darius Rucker, Ed Sheeran, Blake Shelton, Carrie Underwood and Keith Urban. These primarily present-day music stars will be commemorating Presley's famous 1968 television special which also aired