What is the wierdst song in the world ?

Recently, our company had some guests from US.

On the last day of their trip to Japan, we had a small party with them.

At that party, I had try to make them laugh.

I asked them, "What is the the weirdest song in the world ? "

They "???"

Please, guess the answer.

The answer is "Weird word, USA for Africa"

♪Weird world、Weird children〜♪

It doesn't make them burst into laughter, but it did work.
This is the first joke I made them laugh.

Thanks,