Just enjoy the upbeat and joyful lyrics of Mr. Blue Sky by Electric Light Orchestra, a pop-rock anthem celebrating sunshine and positivity.

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.

Jeff Lynne's ELO played "Evil Woman" and "Mr. Blue Sky" during the Rock and Roll Hall of Fame induction ceremony in Brooklyn on Friday.

"Office Ladies" co-hosts Jenna Fischer and Angela Kinsey shared the story of how "The Office" theme song came to be.

Rainn Wilson says The Office theme song was almost Mr. Blue Sky or Float OnThe American version of The Office employed a simple, piano-driven theme song that is inextricably tied to the show. It ...

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.

That song was then recorded a week before The Office premiered on NBC. Still, the use of "Mr. Blue Sky" in the pilot did have a lasting effect.