Have you ever done this?
My number #1's are:
'You're So Vain' by Carly Simon in the US
'Long Haired Lover From Liverpool' by Little Jimmy Osmond in the UK
'Ben' by Michael Jackson in Australia
http://www.thisdayinmusic.com/birthdayno1 (http://www.thisdayinmusic.com/birthdayno1)