One Of The Boys by Katy Perry is a pop anthem where the singer reflects on her transformation from a tomboy to embracing her femininity. The song speaks about the changes she undergoes to fit into a more traditionally feminine mold and her desire to be noticed romantically. The key themes revolve around identity, self-discovery, and the struggle to find a balance between staying true to oneself and societal expectations. Poignant moments include her realization of wanting more than just being 'one of the boys' and the internal conflict that arises from this shift.