The Killers, Brandi Carlile and Bruno Mars have been announced as headliners for Bourbon & Beyond festival 2023.The four-day festival takes place at Louisville’s Highland Festival Grounds in Kentucky from September 14 to 17, dubbed the “world’s biggest bourbon and music festival”.Carlile tops the bill on day one (September 14), with Brandon Flowers and co. taking to the stage Friday (15) along with Duran Duran and Hozier.