The song "Hero" by Jessie J is about empowerment, self-reliance, and breaking free from toxic relationships or individuals who try to control or drain one's strength. In the lyrics, Jessie J expresses her determination to be fearless and independent, no longer allowing others to bring her down or make her feel lonely. The song suggests that someone has been trying to steal Jessie J's powers or manipulate her, but she refuses to let that happen. She realizes that she doesn't need anyone else to save her or be her hero; she is capable of saving herself. The lyrics convey a sense of triumph, with Jessie J asserting that anything is possible and that she feels indestructible. The message of the song is to encourage self-empowerment and to inspire others to stand up for themselves and rely on their own strength and resilience. It emphasizes the importance of breaking free from toxic relationships and embracing one's own power and independence.