Jeff Lynne and the Beatles:
In 1994 Jeff Lynne was approached by the remaining three Beatles to help them produce their "new" songs and restore John Lennon's vocals from poorly-preserved mono tapes containing some unfinished Lennon demos that they were given by Yoko Ono. The songs were "Free as a Bird" and "Real Love". McCartney admitted he was worried about Lynne being chosen as producer saying "He's such a pal of George's. They'd done the Wilburys, and I was expecting him to lead it that way. To tell you the truth, I thought that he and George might create a wedge, saying, 'We're doing it this way' and I'd be pushed out."[3] "Free as a Bird" later won a Grammy.[4]
http://en.wikipedia.org/wiki/Jeff_Lynne_and_The_Beatles