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,

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,

The country singer premiered the record during a performance at the new Nashville venue, The Pinnacle, and dedicated it to her dog, Pepper

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.