this song has being taken off by so many people. Its must be one of the most sung songs. I mean loads of singers have sang some version of it. I think the two best versions are by Lennon and by some woman whose name I cant think of.
http://www.youtube.com/watch?v=krC2QWHzXz0
Pretty Woman is another but I think Orbison is best at that one.
sincerely,
Westside.