 It is best known as the British entry at the Eurovision Song Contest 1968, held in London.The song was arranged, conducted and produced by Norrie Paramor who was also musical director for the contest, which was held at London's Royal Albert Hall.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".