Fresh off his surprise CMA nomination, Jason Isbell and the 400 Unit performed “Cumberland Gap,” a song of their new album, The Nashville Sound on Jimmy Kimmel Live Wednesday night,  September 19th.

The new album was released on June 16th, and with virtually zero radio support, The Nashville Sound, debuted at No. 1 — ahead of Lady Antebellum’s new release, Heart Break. It replaced Chris Stapleton’s From a View: Volume 1 on top