Pharrell Williams is to today turn the Empire State Building yellow for the International Day of Happiness.
Illuminating the iconic New York skyscraper in the bright yellow colour later today in celebration of the occasion - led by Live Earth and the United Nations - it comes in a bid to engage young people in the topic of climate change.
Speaking about the event, Pharrell said: "In a year where there is so much turmoil in the world, from social conflict to climate change, we need moments to stop and celebrate happiness.
"Protecting our planet is fundamental to the pursuit of human happiness and that is why we have chosen to support Live Earth's movement to raise a billion voices for climate action. We believe that happiness can change the world."
The lights of the building are to be changed at 2pm EST (6pm GMT) after which the singer will speak to middle-school students alongside climate experts and UN officials about the importance of taking action to curb climate change.
Pharrell will also be hosting a 'Happy Party' as part of the celebration, encouraging those around the world to upload images of themselves to www.globalhappyparty.com, which will then be transformed into dancing animated images, known as GIFs.
For more information on the 2015 International Day of Happiness go to www.globalhappyparty.com or follow the hashtags #happyday and #happyplanet.
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