#TBT: March 20, 2015 Grammy award winning artist Pharrell Williams joined National Geographic's Explorer-in-Residence Sylvia Earle, Explorer and Environmentalist Philippe Cousteau at the United Nations on the International Day of Happiness to spread happiness and to drive action to fight climate change. #happyday #happyplanet #internationaldayofhappiness #pharrell #pharrellwilliams #nationalgeographic #natgeo #climate #climatechange #liveearth Cc: @unitednations @pharrell @unfoundation Photo by: Stuart Ramson/Invision