The song "Bye Bye Blues" by Julie London is a joyful and uplifting tune that captures the feeling of happiness and relief after a period of sadness. The lyrics describe the surprise and realization that the singer experiences when they see someone smiling, which brings them immense happiness. From that moment on, they are able to let go of their sadness and say goodbye to the blues. The song suggests a transformation from feeling blue to being filled with joy and contentment. The "bye bye blues" refrain signifies the departure of the sadness that once consumed the singer's heart. The mention of bells ringing, birds singing, and the sun shining emphasizes the newfound happiness and positivity in their life. The lyrics also convey a sense of togetherness, as the singer acknowledges that they are not alone in their happiness. The phrase "just we two, smiling thru" implies that there is someone by their side, sharing in their joy and helping them overcome their previous troubles. Overall, "Bye Bye Blues" is a song about finding happiness after hard times and leaving behind the sadness that once plagued the singer. It celebrates the power of a smile and the transformative effect it can have on one's outlook and emotions.