HAPPY BIRTHDAY! From "Chicken Fried" to "Knee Deep," Zac Brown has helped make the Zac Brown Band one of country music's defining acts, delivering some of the

HAPPY BIRTHDAY! From "Chicken Fried" to "Knee Deep," Zac Brown has helped make the Zac Brown Band one of country music's defining acts, delivering some of the anthems that define the American summer. For more than two decades, the band has blended a timeless country sound with unforgettable live s…