Kristian Bush recently released his debut solo album, Southern Gravity, and the singer-songwriter says that while the new set of tunes includes commercially appealing songs, there are a few tracks that made the final cut solely because they are significant to him.

"[Some] of them -- it's in the dead center of [Southern Gravity] -- [are] kind of just for me," Bush tells The Boot. "I do that sometimes. I did that with Sugarland records: I'd get a couple songs where it's like, 'Look, I don't care what anybody thinks. This is mine, and I'm putting them on there.' And in this case, they're right in the middle; there's one called "Giving It Up," and there's one called "Feeling Fine.""

Bush adds that, sometimes, those songs can even end up directing the tone of the entire project.

"The title track to the last record that I did with Sugarland, Incredible Machine -- the title track of Incredible Machine is one of those," he reveals. "They resonate so much with me that it would be a failure to myself not to record it."

“Trailer Hitch,” the debut single from Southern Gravity, landed in the Top 25, but Bush says that regardless of whether the other songs are a commercial success, they are an important part of the new album.

"I'm kind of excited to hear how people attach to it," he notes.

Southern Gravity is available for download on iTunes, Amazon and Google Play.

Bush has plenty of shows on the calendar over the next several weeks, including stops in California, Tennessee and Florida. A list of all of his upcoming shows is available on his website.