Over 160 A-list acts took part in ten Live 8 concerts on July 2.
Here's what some of them had to say about the event.
Snoop Dogg
"There's a lot of rich people in the world and a lot of them are just selfish. The Live 8 people are saying they don't want it to be like that any more."
Bono, U2
"The rock stars and hip hop stars can't change anything, but the audience can.
They can put the politicians who can do something in and out of office.
We are not looking for charity, we are looking for justice. We cannot fix everything but the ones we can we must."
Chris Martin, Coldplay
This is the greatest thing that's ever been organised probably in the history of the world.
Can we take this opportunity on behalf of all the bands and on behalf of you people to say to Bob Geldof he is a hero of our time and he deserves all the credit he gets.
Sir Bob Geldof, Live 8 organiser
"I need to get over the shock that this thing is actually happening and that thousands of millions of people around the world are watching.
I'm just listening to the bands - they have had hardly any planning but have been just fantastic."
Madonna
"Are you ready, London? Are you ready to start a revolution? Are you ready to change history?"
Johnny Borrell, Razorlight
"My message to the G8 leaders is that this is their chance to make a lot of difference in the world and to come back fulfilling their promises rather than coming back with empty promises.
This is their chance to show the world politics is not just show business for ugly people."
George Michael
"It was an amazing feeling back in 1985, similar to today. It's fantastic - a lot more countries feel a lot more involved.
This is unbelievably well-timed and incredibly effective. It's a great, great day."
Sir Paul McCartney
"Everybody who's come along today has come for the right reason. We hope that the people, the heads of G8 are listening hard.
They can't avoid this, they cannot have missed it and all you people who've come along for this message - we love you."
Nelson Mandela, former South African President
"History and the generations to come will judge our leaders by the decisions they make in the coming weeks.
I say to all those leaders: Do not look the other way, do not hesitate ... It is within your power to prevent a genocide."