The 32-year-old "American Idol" alum, who welcomed her first son Isaiah Michael in March with husband Mike Fisher, said she initially tried avoiding making a song on motherhood, reported People Magazine.
"I tried to avoid the 'mommy' songs, but one managed to find it's way in there! I'm glad it did, because he (Isaiah) will always have that."
During a Facebook interaction with fans, the "Something in the Water" hitmaker said she makes up lullabies to sing to her little baby.
Underwood also said one of the songs, "Smoke Break," will be about the hectic schedules and the little breaks people have in between.
"(It is) one of those story songs that I feel like everybody can relate to, about how life is so hectic and it's so nice if and when you get to step away for a second.