going back wrote: i have one version queen live copenhagen 1978 downloading i have heared half a song and there freddie sings 1/3 of the song and i've heard that there is a version where freddie sings full song
I am not sure... I'm really not sure... Though I ain't a Queen lives expert, but as I know it was only one occasion.
From Martin's (Mr Scully) link
Glasgow, 1.12.1979 "Roger completely forgot the words to 'I'm In Love With My Car' and after an "instrumental part" Freddie realized Roger's blackout and had to sing a couple of lines to help him."