When Jeff Lynne wrote the rather catchy Do Ya for the Move they (unwisely, IMHO) stuck it on the B side of their 1972 single California Man. And there it would have stayed if it hadn't been for one Todd Rundgren. In 1975 Rundgren and his pick-up band Utopia were dropping it in their live set and everyone, seemingly, thought it was one of theirs. Well they would, wouldn't they? It sounds like a Todd Rundgren song.
The Move - Do Ya (1972)
So when the perma-shaded Lynne - by now fronting the Electric Light orchestra - got wind of this he must have said to himself 'Fuck that for a game of soldiers' and promptly rerecorded it for the next ELO album. A New World Record released in 1976 went on to shift five million copies in its first year of release alone; thanks, obviously, to the inclusion of Do Ya.
Todd Rundgren - Do Ya (1975)
And, yes, its striking resemblance to the Sweet's Fox on the Run hasn't gone unnoticed. The harmonies, in particular, have been lifted wholesale. I can only think that Jeff Lynne must have been feeling quite magnanimous about the whole thing and didn't bother filing a lawsuit; cushioned as he was, probably, by his millions in the bank.