 We're speaking with Melissa Ruggieri, national music writer for USA Today. Her story is just the summer of rock, how tours from Creed, Def Leppard, and others are igniting fans. So what about the relationship between country music and rock music? How do those two genres somehow tie together? It's crazy, really, to see just what the crossover has been. I mean, you look at someone like Morgan Wallen, and he's been performing with artists like Post Malone, and he's also selling out stadiums and is hugely popular in the country world.