Jennifer Nettles, once the lead vocalist of hit-making duo Sugarland, is embarking on a solo career.

The 39-year-old singer revealed in an interview Monday, at the ASCAP Country Awards, the album's finished, she's chosen a cover photo and now she has a release date for her solo debut.

Nettles kicked off a listening party for the project at an event in Nashville. She will also be attending the 47th Annual Country Music Association Awards on Wednesday and will serve as host during the taping Friday of the CMA's.

"I think this album so far for me musically has been the most intimate and personal ... musically and vocally," Nettles told the Associated Press. "I think it's way more intimate to me and way more personal in the sense that when you collaborate, that's the nature of collaboration, you're affecting each other, and playing with and inspiring each other, and yet there are things that one may not get to do or want to do when collaborating."

The Grammy Award-winning duo, Sugarland is on hiatus. She and band-mate Kristian Bush earned multiple CMA and ACM nominations and awards, but this time around, Nettles notes her solo work will show a vastly different side to her.

Nettles said motherhood and marriage has changed her views on life.

"I'm able to show a side that I think's more womanly," Nettles said. "I think it's more mature, and so that's big for me. I think it gives you perspective all around, not just musically but also in my career. I think you get superefficient because you have to be. You don't worry about things that were superimportant before because you have a baby and you just burn that underbrush out. You feel like a huntress."

"That Girl" is scheduled to be released on Jan. 14. The lead single also titled "That Girl" is available on iTunes now.