Just how old is Rod Stewart?

If you ask me Rod Stewart looked pretty good last night on American Idol. He sang "Don't you think I'm Sexy." I don't, but my wife does, even if he is as old as the Stones.

Ros Stewart is 64 going on 65. He was born in 1945 and had his first of 7 confirmed children in 1964 while still a teenager and the last in 2005 while still...?

I do have to hand it to the guy, he does look pretty good for someone who lives a life like he does.