A song used in a late 70s/early 80s worldwide advertising campaign by the Coca-Cola Company. The television adverts featured lots of happy smiling children of all races dancing around. Factoid: in apartheid South Africa the advertisement had to be remade to feature only white kids.

I'd like to buy the world a home,
furnish it with love
grow apple trees, honey bees
and snow white turtle doves

I'd like to teach the world to sing,
in perfect harmony
I'd like to buy the world a Coke,
and keep it company