Over the years, mainstream Nashville country has absorbed the sounds and aesthetics of ’70s and ’80s rock, especially as those styles have disappeared from the pop mainstream. We should be ready for the same thing to happen with ’90s rock. Judging by last night’s CMT Awards, it might already be happening. Last night’s show featured performances from some of country’s biggest names, including Shania Twain, Keith Urban, Blake Shelton, Carrie Underwood, and Kane and Katelyn Brown. But the show also featured a whole lot of ’90s rock stars performing their hits alongside Nashville royalty.