Carrie Underwood's 'Greatest Hits: Decade #1' is still a few weeks from its Dec. 9 release date, but the singer is spilling the details of another one of the project's new songs, 'Little Toy Guns.'

"There’s these characters in the song, and there’s a little girl, and she hears her parents fighting, as unfortunately a lot of kids do," Underwood tells the Country Vibe. "So it’s basically her saying, in her words, I wish their words weren't real. I wish they were like little toy guns and they didn't hurt you.”

Underwood says she drew from personal experience when penning the powerful song, which she co-wrote with Chris DeStefano and Hillary Lindsey.

"I've seen it firsthand from different people in my life and seen how the tumultuous parental relationship between each other can affect a child," she says. "So that’s kind of what it’s about, but it’s a really tempo-driven song as well, so it’s kind of a bit of a juxtaposition as far as the story content and the music."

It's a fitting song for the mother-to-be, whose first child, a baby boy, is due in the spring. The songstress a says she already has a few role models she will look to as she raises her son.

"I know it’s possible to be a great mother and to be on the road,” she says. “You don’t have to sacrifice that much. I see people like Martina [McBride] do it and Faith [Hill] do it. I know it’s a possibility. I just maybe need to sit down with them and say, "How DO you do it?'"

Pre-order 'Greatest Hits: Decade #1' here.

You Think You Know Carrie Underwood?