I would like to know if Roger sings in the chorus before the guitar solo on The show must go on. When I listen to it I hear Freddie and Brian, but not Roger. Maybe he sings but I don't hear him.
He's there. His voice isn't too noticeable in the final mix because it's, well, mixed, with Freddie's and Brian's, not to mention the instrumentation.
It can be heard more clearly in the a cappella stem: link
Edit: I'm listening to it at the moment and IMO it's only Brian + Brian + Brian on the backing vocals for the second chorus (plus Freddie's lead), but for the third chorus (the one after the middle-eight) it's the three of them singing each part, as well as the 'on with the show' bit. Otherwise it's just Brian (e.g., 'learning', 'turning' and the very last line, then looped).
I always wanted to mentioned that.
Do you hear an edit on 1:55 between "ROUND THE CORNER" and "NOW" ?
I first noticed it in the accapela version above.