Kacey Musgraves launches her first-ever fashion collaboration with heritage denim brand Lee today across 2,100 Walmart stores in the United States. The Grammy-winning country artist will personally greet fans at the Franklin, Tennessee Walmart Supercenter from 5:30 p.m. to 7:30 p.m. CDT, celebrating the debut of her Kacey Lee collection—a 100-piece capsule featuring denim, sleepwear,…