Bit of fun here, have you ever done this?
This day in Music
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).
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
Some are better than others!