What is the most frequently heard song in the world?

Happy birthday to you.

The copyright of this song is in Warner Corporation, that is, every time you click this song in a public place in the United States, you will pay the copyright fee to Warner. So far. . . Warner made a profit of more than $20 million from this song. . . . (This is only in America. . )

And this song is played more than 654.38+0 billion times every day in the world. . .