Zac Brown Band always flirts with the mix between country music and jam band rock and roll. On his newest album, his mixes everything up in a huge way, showing off all his many musical facets. Guest appearances are made by country superstar Alan Jackson and hippie extraordinaire Jimmy Buffet, showing Zac's range, as well as his ability to have fun playing music. While this album may feature much more country than rock as compared to his critically acclaimed debut, it does feature one of his best songs ever written, "Who Knows," which is as fun in the studio as it is live. The song, clocking in over nine minutes, shows off his true core as an epic jam rocker. Zac Brown Band are part of a new generation that is blurring the lines between country and rock, and if you can get rock fans to listen to country and vice versa, you have found yourself a successful career path.