According to wikipedia it is inspired by Gershwin:
Quote: The central theme of Rhapsody in Blue is used as a riff in The Electric Light Orchestra's "Birmingham Blues" off their 1977 hit album Out of the Blue. (listen at 0:28!)
According to myself it is also inspired by John Fogerty's 'Rockin' All Over The World' (1975, covered in 1977 by Status Quo and in 1983 by Carl Wilson)
Written by: Jeff Lynn (&...?)
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+ Another tune from Out Of The Blue with nice harmonies:
(the a capella part is based upon an old classical chord chart)
Electric Light Orchestra - Wild West Hero (Remastered)