Meaning of "Jar of Hearts" by Scott Bradlee's Postmodern Jukebox

The lyrics of "Jar of Hearts" portray the journey of healing and empowerment after experiencing heartbreak. The protagonist in the song has overcome the pain caused by their past lover and has learned to live without them. The repeated question of "Who do you think you are?" reflects the disbelief that the ex-lover would have the audacity to return after inflicting scars and collecting a jar of hearts. The lyrics emphasize the importance of self-respect and standing up for oneself, showcasing a newfound strength and determination to not allow toxic people back into one's life. Overall, the song conveys a message of resilience, self-worth, and moving forward from a past that brought only hurt and broken promises.