This is a song about a person who is feeling sad and alone. She is searching for answers and trying to find happiness, but she is unable to find it. The "mirror on the wall" is a symbol for self-reflection and the person is asking for guidance, but she is met with her own reflection, which only shows her broken heart. The chorus repeats that there are no ball gowns or fancy crowns, just a broken heart, symbolizing that material possessions cannot bring happiness or heal a broken heart.
