The song is about a female deciding there must be "wild angels" watching over her and her man, which are keeping their love alive. Matraca Berg told The Boot
the story of how the three songwriters crafted the hit. "I started it with Harry. I don't know what we were smoking that day, but it was a very lofty, kind of poetic, lyric. I heard it [recently] and thought, 'What was I thinking?'"
"We demoed it, and every time Pat [Higdon, my publisher] would play it for somebody, they would say, 'What does this mean'" I knew that the lyric was off, but they loved the music, they loved the title."
Matraca Berg and Harry Stinson brought in Gary Harrison for the rewrite. "It was just so simple," said Berg. "[He said], "You say, 'Wild angels, wild angels' — what's this other thing, 'Blue horses'?" And after we got that figured out, Martina snatched it up."
"Gary gave me an epiphany with that song," she added: "Get them a good, kick-ass chorus, and you can write whatever you want to in the verses."