Each year Urban creates a theme for the show and invites artists from across the spectrum of country music - legends, newcomers, and arena headliners alike - to take the stage and pay tribute to the Hall of Fame.

"I pick a theme every year to give the fans something different," Urban told Radio.com. But he admits there's also a practical purpose: "It helps me have a criteria for the guest list. Because there's always more people that I want to play than we can have play."