[Cliff Richard song] Phil Coulter originally wrote the song as `I Think I Love You`, but was unsure of the lyrics and got together with Bill Martin (the same team that wrote `Puppet on a String`), who changed it to `Congratulations`. The song was immediately popular in the UK and became a number one single. On the day of the contest, it was... Found on http://en.wikipedia.org/wiki/Congratulations_(Cliff_Richard_song)