Lauren Alaina debuted a new song at the CMT Next Women of Country event in Nashville this week -- but not just any song. The teen reveals that the intimate and emotionally resonant track 'Same Day, Different Bottle' is about her father, J.J. Suddeth, who recently completed a stint in rehab.

As a result, the song was like a therapy session for the 'Georgia Peaches' singer, who is close with her dad.

In a chat with Yahoo!, Alaina admits that her father is back in Chattanooga, but she has yet to see him since he completed his treatment.

"That song was like therapy for me," she reveals. "It’s not easy growing up in a household with something like that. I love my dad -- he’s one of my favorite people in the world -- and he’s a great person. He just struggled with alcohol, and he’s overcoming it right now, so I’m really proud of him."

Papa Suddeth has heard the song, and as expected, it made him emotional.

"I played him the song, and he loved it," the singer, who has only recently forayed into writing songs, shares. "It made him cry. I think it was good for him to hear my side and to see how it affected me."

But despite the depth of the song and how it mines a difficult personal situation in her life, there is no bitterness -- Alaina is thrilled for the fresh start. "Today is a new beginning for him," she shares. "It’s gonna be a battle for the rest of his life, but I’m going to be right there with him, and pray that every day he doesn’t want to drink it up and touch a bottle. I hope it’s no longer the same day, different bottle. Different day, no bottle!"

Alaina spills that the biggest difficulty in penning 'Same Day, Different Bottle' was allowing herself to open up to fellow songwriters. "It was therapeutic. I went in that day and it was weighing on my heart," she admits. "I was worried about my dad and about my life. I didn’t want to write about it, yet I did want to write about it, because I knew it would probably make me feel better.

"I never, ever even talked about my dad drinking --- ever -- to anyone," the singer insists. "Some of my best friends that I grew up with didn’t know; he went to work every day ... So for me to get in a room with two other writers and say, 'My dad’s an alcoholic -- can we write a song about it?' is a hard thing to say."

Adds the 18-year-old, "I’m so glad I did. Because in a weird way, I think it helped my dad and helped me."