General:
* One world, one song, one hope.
* Together we stand, for a better tomorrow.
* United voices, united hearts, united world.
* Let's build a world where everyone can thrive.
* We are the change, let's make it happen.
Focusing on unity:
* Hand in hand, we can make a difference.
* Together we are stronger.
* Bridging cultures, building a future.
* Beyond borders, we are one.
* From every corner, a chorus of hope.
Emphasizing action:
* More than words, we need action.
* Change starts with us.
* Let our voices be heard.
* We are the world, let's make it a better one.
* It's our world, let's take care of it.
Humorous/catchy:
* We Are the World, and we're here to stay.
* We Are the World, and we're ready to play.
* We Are the World, let's make it a jam session.
The best slogan for you will depend on the specific message you want to convey.