Based on our experience traveling for almost nine months, we have conclusively identified the Most Popular Song In The World.

We heard it in Australia and New Zealand and Thailand and India. In taxis and buses and hotel lobbies and a Chinese IMAX theater. We’ve heard the Mexican version, the Muzak version, and a live band version. Plus, a 10-year-old Nepali boy insisted on singing it to us.

Take a guess: what is the Most Popular Song In The World? It’s a song most of you have heard… but not as often as we’ve heard it.

A fabulous cash prize will be awarded for the first correct answer posted here or on Facebook! What’s your guess?