Bit of fun here, have you ever done this? http://www.thisdayinmusic.com
It shows you what song was at No.1 on the day you were born.
(Go to 'Birthday No.1' at the top of the site, it’s free, you don’t have to log in).
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 Jacskon in Australia
Some are better than others!