Live 8 concerts around the world have taken place with the aim of putting pressure on world leaders to help make poverty history.
More than 200,000 people cheered as U2's Bono and music legend Sir Paul McCartney kicked off the London leg of the biggest concert the world has seen.
Coldplay, Dido, Keane and Ms Dynamite took to the stage on Saturday with loads more acts lined up.
Nine concerts are hapening around the world at the same time.
They're being hosted in Philadelphia, Paris, Johannesburg, Rome, Berlin Moscow and Ontario in Canada.
The events come ahead of next week's G8 summit in Scotland, where the leaders of the richest countries will meet to talk about how to help stop poverty in Africa.
Global gig
More than 160 artists worldwide are taking part in the event, which is being broadcast in 140 countries and watched by around 5.5 billion people.
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Live 8 in Hyde Park
5,000 roadies and caterers will help the show run smoothly
At least 175 catering vans have been brought into feed artists and crew
They'll eat 30,000 sausages, 40,000 bacon rashers and 60,000 eggs
Over 1,400 toilets have been set up
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In a speech in London singer Bono told the crowd: "This is our moment, this is our time, this is our chance to stand up for what is right.
"We are not looking for charity, we are looking for justice."
UN Secretary General Kofi Annan also took to the stage in Hyde Park and said: "This is really a United Nations. The whole world has come together in solidarity with the poor."
End tragedy
Over in Philadelphia actor Will Smith linked up live with the other concerts around the world.
"We are all in this together. We are calling on the eight most powerful leaders in the world to end this tragedy of poverty," he said
At Johannesburg's Live 8 concert former South African President Nelson Mandela went on stage and appealed for leaders not to look the other way.
He said "It is in your power to prevent a genocide against humanity. We stand tall and await your direction."
The music marathon is set to continue through the night, with the Philadelphia concert set to end in the early hours of Sunday morning.