With megahits like "Come Sail Away," "Lady," "Fooling Yourself" and many more, the arena rock gods of Styx took the world by storm in the late '70s and early '80s. The success of their soaring power ballads and progressive rock jams led the band to musical immortality, landing them four consecutive multi-platinum albums. Performing more live shows since '99 than in all the years prior, Styx continues to prove their lasting power and appeal. And REO Speedwagon has enjoyed similar longevity. The undisputed arena kings of the '80s, they packed stadiums on the strength of power ballads like "Keep on Loving You," "Can't Fight This Feeling," Take It on the Run" and "Time For Me to Fly." This summer the two groups are teaming up and heading out on the United We Rock Tour, along with ex-Eagles guitarist Don Felder. You can see these epic rock icons when they come through Concord Pavilion.