When country superstar Tim McGraw played Blossom last summer, he braved the rain to strut from the side of the stage and cut through the crowd, slapping high fives along the way. Wearing a black cowboy hat and a tank top that exposed his beefy, well-toned arms, the guy looked like he was on his way to a wrestling match as the Imagine Dragons anthem “Radioactive” played over the PA system. McGraw opened with the poppy “Where the Green Grass Grows” and then he and his stellar eight-piece band ran through all of his biggest hits. His new album, Sundown Heaven Town isn’t due out until September but expect to hear some tracks from it at tonight’s show. (Niesel)