See how "Mr. Blue Sky" was inspired, what little-known facts hide in the composition, and where the song appears in pop culture.

Jeff Lynne said Paul McCartney felt ELO's "Mr. Blue Sky" reused a riff from one of The Beatles' most famous psychedelic songs.

Known for hits including "Xanadu" and "Mr. Blue Sky" - that's the song you're hearing now - ELO has sold over 50 million albums since the band formed in the 1970s.