A song performed by English rock band The Electric Light Orchestra, which specialised in rock music with classical overtones.
In a 2020 poll by small British radio station Greatest Hits Radio, a fifth of all respondents voted Mr Blue Sky as the 'happiest song' ever.
The song appeared on the ELO album Out Of The Blue with a vocoder voice singing 'Mr Blue Sky', but the final symphonic passage ends with the vocoder instead singing "Please turn me over" as it was the last track on side 3.