Meaning of "Who's That Girl" by Hilary Duff

The lyrics of "Who's That Girl" delve into themes of identity, betrayal, and heartbreak. The singer expresses deep confusion and hurt as she grapples with the realization that someone else seems to be stepping into her place in the life of the person she loves. The repetition of the question "Who's that girl?" conveys the emotional turmoil and introspection that the singer is going through, trying to understand how she has been replaced and what this means for her sense of self. The lyrics also touch on the idea of self-worth and the fear of losing one's identity to another person. Overall, the song captures the feelings of insecurity and jealousy that can arise when faced with the threat of losing someone dear to you.