When Little Big Town and Sugarland debut a brand new collaboration on the 2024 CMT Music Awards, it will be more than just a new song: That night will mark the return of Sugarland to the country music spotlight. While details surround the song itself are under wraps, it will be a welcomed sight to see Jennifer Nettles and Kristian Bush together again. It’s been seven years since their last album, Bigger, was released. The performance also marks 13 years since their appearance on the show’s stage. They’ll join Karen Fairchild, Kimberley Schlapman, Philip Sweet and Jimi Westbrook — aka Little Bi…