Willie Nelson and Kacey Musgraves teamed up to cover "Are You Sure," an old Willie song from 1965, for a secret track on Musgrave's Pageant Material. They even filmed the music video in Austin's White Horse Saloon. Now, the singer-songwriters are teaming up again on the road for two shows in New Braunfels. Saturday night is sold out but you can still catch them on Friday. And you can get a copy of Nelon's forthcoming album with every pair of tickets (read: two) you order from Whitewater Amphiteater.