When Kacey Musgraves served as the opening performer at the new, 4,500-person capacity music venue The Pinnacle in Nashville on Thursday night (Feb. 27), she featured a new, unreleased song as part of her set - a song she wrote about her Australian cattle dog,

Musgraves wrote this song with Trent Dabbs, and it was featured in season one of the country television drama Nashville, performed by Charles Esten’s character Deacon and Hayden Panettiere’s character Juliette. The song was also featured on the compilation album The Music of Nashville.

Kacey Musgraves premiered a new song called 'She's My Bitch' during her concert at the opening night of Nashville's pristine new venue the Pinnacle.

At the debut of Nashville's newest music venue, The Pinnacle, on Thursday night (February 27), Kacey Musgraves premiered a song she wrote about her dog. The song is playfully titled, "My B*tch," and the country superstar wrote it about her beloved Australian cattle dog,

Kacey Musgraves treated the crowd at a newly-opened Nashville venue to a rendition of an unreleased ballad that she wrote as a tribute to her dog, an Australian cattle dog who's "so spicy" she's named Pepper.