This is one of three songs recorded by Birdy for The Fault in Our Stars
movie soundtrack. She explained to The Idolator
that this track was completely inspired by the film's storyline. "'Not About Angels' was really about how Hazel, the main character, feels like she's like a grenade," she said, "but her realizing that if you have something so true and beautiful, it should be cherished, so, for me, that was really inspiring."