Lauren Alaina's new single: 'Eighteen Inches'

Lauren Alaina's follow-up to Georgia Peaches is the song she got from Carrie Underwood. The fourth-season American Idol champ wrote Eighteen Inches, the 10th-season runner-up's new single, with Kelley Lovelace and Ashley Gorley.

Lauren says Eighteen Inches reminds her of a good friend. "She got married when she was 17, and she had a baby," she says. "And they moved here, to Nashville. Her husband's...