Queen - A Kind Of Magic

Roger Taylor wrote the melody and chords of this song for the Highlander film, then Freddie Mercury wrote a new bass line, added some instrumental spacers, changed the order and produced a new mix with David Richards. Taylor was reportedly very annoyed that Mercury had almost completely re-written the song behind his back (reportedly whilst he was on holiday!), so perhaps that explains why the song was still credited only to Taylor. Roger's version is at the end of the film; Freddie's version is on the album.