I played bass on that in my once-a-year Beatles tribute band. Only had to sing the 'oohs' during the chorus. Song was a bitch to play, let alone attempting to sing it at the same time. Same thing for the lead guitarist part- triple picking.
Ooo! Ooo! Tempted to start a thread entitled "B****d hard songs to play on guitar" ! No, because I HATE "listing" threads. (the Boxer?)
I am going back 50yrs but it seemed most of the piano sheets (all you could get) were in e flat or some other awkward for guitar key? Being the only one in the band with even a smear of musical knowledge I had to transpose all the songs into chords we could play and key the singer could manage.
Dave.