A mom of three, balancing exhaustion, love, and the quiet weight of postpartum struggles, turned her story into an original song that felt less like an audition and more like a confession. As the lyrics unfolded, the energy shifted — and Carrie Underwood couldn’t hold back tears, moved by a performance that didn’t ask for sympathy, only understanding.

“Well, that’s about the most relatable song I think I’ve ever heard,” Underwood told Harper, who was later…