Debuting more than two decades ago, Little Big Town has won over country music fans with their four-part harmonies and mega-hits such as “Boondocks,” “Pontoon,” “Girl Crush,” and “Better Man.” The quartet – Karen Fairchild, Kimberly Schlapman, Phillip Sweet, and Jimi Westbrook – released their ninth studio album Nightfall with a sold-out premiere performance at Carnegie Hall. Gate Time: 6 PM