The song became popular over time.
Though it was not a big hit initially, the song grew in stature over time. It was consistently showcased in ads, TV programs, films and there were several cover versions released through the years. The single has even reached Gold in the UK. There is no wonder why it became a multi-generational success. It is also a song that people across ages can relate to. If the study were conducted in a bigger scale, this song would still probably end up on top of the pack of the happiest song in the world.
