Pharrell steers Live Earth concerts
Pharrell Williams is to oversee a series of Live Earth concerts around the world to draw attention to climate change.
The concerts were last staged in 2007 and included a major show at Wembley Stadium, although this year's events do not include a UK performance.
Nobel Peace Prize-winner Al Gore teamed up with Pharrell and producer Kevin Wall to announce six Live Earth: Road To Paris concerts which are designed to focus attention on the United Nations Climate Change Conference in the French capital in November.
The concerts will take place on June 18 with more than 100 major stars taking part at shows in Paris and New York, as well as locations in Brazil, South Africa, China and Australia.
Announcing the news at the World Economic Forum in Davos, Switzerland, organisers said they expected the shows to be seen by a global audience of two billion people.
The aim is to encourage world leaders to adopt a new climate accord at the Paris talks.
Happy singer Pharrell said: "I think you guys know how serious the global warming thing is, and so for us we're taking it very seriously, and we wanted to do something very different this time.
"Instead of just having people perform, we literally - and I can't go into it now because some interesting surprises are coming out soon - but we literally are going to have humanity harmonise all at once."
The 2007 Wembley concert attracted the likes of Madonna, Foo Fighters, Kasabian and The Black Eyed Peas. Pharrell also took part back then, at Copacabana Beach in Rio De Janeiro in Brazil.