Que Sera, Sera (Whatever Will Be, Will Be) by Jay Livingston and Ray Evans played on chromatic harmonica: HOHNER CX-12 Jazz in C.

I recorded the backing track and my harmonica playing separately and then mixed them together so that the sound is way better, you can hear the backing track very clearly and the bass in particular.

It reached the Billboard magazine charts in July, 1956. The song received the 1956 Academy Award for Best Original Song with the alternative title "Whatever Will Be, Will Be (Que Sera, Sera)."