Summer music-festival style requires skill. How else are concert-goers supposed to contend with the heat, the rain, and the crowds? Well, this past weekend's Governors Ball was full of concert pros that braved the mud all for the sake of rock (and hip hop and pop). So, in between getting low, singing along, crowd surfing, and, uh, trudging through that muck, we made sure to document the best of the belles of the ball and some favorite acts. Ahead, 15 snaps that were our true headliners.