The song 'The Mixed Tape' by Jack's Mannequin is a reflection on the power and emotional significance of music in our lives. It delves into themes of nostalgia, longing, and the deep connection we feel to certain songs or playlists, which often become the mixed tapes of our memories. The lyrics convey a sense of trying to capture and hold onto moments and feelings from the past, especially those associated with a significant other. Poignant moments include lines that highlight the singer's yearning for connection and the way music serves as a catalyst for reliving those intense emotions.