- Original Artists: ELO
- Album: Out of the Blue
- Released: 1977-01-01
- Recorded: 1978-01-28
- Genres: R&B, 70s, Acoustic
- Artists: Pudenski Brothers
The lyrics to 'Mr Blue Sky' are simple and easy to visualize. When the song is playing, you can picture everything that's going on and everybody knows what I'm talking about. It's the thought of, 'Oh, isn't it nice when the sun comes out?' And you know, it really is. 'The sky is blue, wow, what a thing.' It's a simple kid's story." Also prominent in the song is a vocoder, a unique electronic voice that was just becoming popular in pop music during the mid-1970s. Jeff stated that he was inspired by a 1950s era children's recording with a character called "Sparky's Magic Piano" in which a synthesizer is used for the piano to speak to young Sparky in the story.
Suddenly the sun shone and it was, 'Wow, look at those beautiful Alps.' I wrote Mr Blue Sky and 13 other songs in the next 2 weeks. The song features a heavily vocoded voice singing the phrase "Mr Blue Sky". On The Out Of The Blue Album version of the song a second vocoded segment at the end of the song was often interpreted as "Mr Blue Sky"; it is actually "Please turn me over" as it is the end of side three, and the listener is being instructed to flip the LP over.
The song's arrangement has been dubbed "Beatlesque", as it has similarities to Beatles songs 'Martha My Dear' and 'A Day in the Life', and it shares its unusual first four chords and harmonic rhythm with 'Yesterday'.