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(Yahoo!) - Lauren Alaina is in country music for keeps. And if you've doubted that, you need to check out this video of her boldly debuting a song she just co-wrote, "Same Day, Different Bottle," at a private music industry party in Nashville on Monday. The American Idol alumnus turns 19 on Friday but seemed soulful well beyond her years as she delivered a bold, freshly minted ballad about her father's struggle with alcoholism.

Alaina performed the song for about a hundred guests at a CMT Next Women of Country brunch. Although the tune really wasn't intended for public consumption yet — she hasn't even started recording her second album yet — we caught her performance on shaky-cam video, and Alaina graciously allowed us to share it with you, as a glimpse into the pain she's experienced personally and the great strides she's making professionally.

Yahoo! Music caught up again with Alaina in Nashville Tuesday night to ask her about the true-life story behind "Same Day, Different Bottle."

"The song is about my father," she confirmed. "He actually got out of rehab today! I haven’t gotten to see him yet, because he’s back in Chattanooga, where I’m from. That song was like therapy for me. 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. I played him the song, and he loved it. It made him cry. I think it was good for him to hear my side and to see how it affected me. Today is a new beginning for him. 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!"


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