"Dance like no one’s watching, smile like love, and believe that happiness can change the world.” — Pharrell Williams

Nat Geo Kids teamed up with Pharrell Williams, who wrote and produced the song "Happy," to celebrate the United Nation's International Day of Happiness on March 20. "Happy people, happy planet" was the theme for this year's celebration.

Pharrell Williams and explorer Phillippe Cousteau raise their hands in response to Sylvia Earle's call for people to raise hands and pledge to protect the planet.
Pharrell Williams and explorer Phillippe Cousteau raise their hands in response to Sylvia Earle's call for people to raise hands and pledge to protect the planet.
Photograph by Stuart Ramson, UN Foundation

Read the interview with Pharrell.

NGK: What makes you happy about the International Day of Happiness?

Pharrell: I love the idea of the whole world coming together on one day to celebrate the things that make them happy.

NGK: This year's theme is "happy people, happy planet." Why is protecting the Earth important?

Pharrell: Earth is our home and each of us needs to do our part to protect our planet so that people, and all life on the planet, can be happy for years to come.

NGK: What can kids do to make the Earth happy?

Pharrell: Kids, you can make sure you recycle plastics, ride a bike instead of getting a ride in a car, turn off the lights when you are not using them, and learn as much as you can about climate change by asking your teachers questions, doing research online, and coming up with your own creative ways to save our planet.

NGK: Anything else you'd like to tell National Geographic Kids?

Pharrell: Happiness is contagious! If you can find the happiness within yourself and share it with someone else, you will do your part in spreading happiness across the globe.