As many as 20,000 people attended a rally in London to support the largest ever campaign against world poverty.
Former South African president Nelson Mandela, singer Jamelia and lots of children were involved in the event for the Make Poverty History campaign.
The rally is taking place ahead of talks between seven of the world's most powerful nations - the G7 group, which includes the UK, the US and Japan.
Make Poverty History wants to get developing countries' debts cancelled.
Jamelia sang at the rally
It's also campaigning for more aid and fairer trade for poor people.
The group - which includes more than 100 charities, unions and religious groups - has launched a white arm band for people to wear to show their support.
Mr Mandela urged world leaders not to "look the other way" from poverty. A group of children joined the former president on stage to make speeches in front of the massive crowd.
Thirteen-year-old Chloe travelled down from Scotland to make a speech at the Trafalgar Square event.
Making the speech Chloe admitted to being "absolutely shaking" but hopes that if everyone works together the white band campaign will really make a difference.
Ministers from the G7 countries are meeting in London to discuss how they can help people in the developing world.