I see Rod doesn't have to worry about his voice, he just gets the audience to sing his hits.
I never regarded Herr Stewart as a serious rock artist, he has a pleasant voice and sings some great easy listening stuff and some abyssmal things too (all-time low was Love Touch - makes me wince to this day, it was worse than the movie it came from and that
is saying something -
and that thing with Sting and Adams for the Musketeer movie was
schrecklich too). But he never lost credibility or integrity to me because he never really bothered to have it in the first place. Right from the advent of joining the Faces he carefully worked (and succeeded) at his solo career as a MOR and easy listening singer. There was nothing wrong with that, he was upfront about it. No his voice isn't what it used to be, but whose sixty year old singer's is?*** He still does a crowd pleasing job if he doesn't overstretch himself.
And hey, AOR, MOR and easy listening are not 4-letter words. Like Hellboy and his aquatic sidekick I'm a sucker for this here. In fact, Rod should do a version of it though Barry is pretty much impeccable on this:
http://www.youtube.com/watch?v=3MvhhD6eKaY&feature=related*** Leonard Cohen's voice or non-voice, the guy is in his midseventies now, has actually gotten better. I saw him in concert earlier this month (sold out Frankfurt's largest hall) and his voice and performance was spine-tingling.