Bob Geldof has announced plans for the follow-up to Live Aid, entitled Live 8.
Live 8 aims to raise awareness of global poverty and will coincide with the G8 summit in Scotland.
Star-studded, free concerts will take place in London (Hyde Park), Paris (the Eiffel Tower), Berlin (the Brandenburg Gate), Rome (Circus Maximus) and Philadelphia (venue tbc) on 2 July.
In a statement referring to the G8 leaders, Geldof said: "Charity will never really solve the problems. It is time for justice - and 20 years after Live Aid, people now demand it of these eight men."
The line-up for the Hyde Park show in London includes U2, Paul McCartney, Madonna, Coldplay, REM, Dido, Sting, Joss Stone and Robbie Williams.
Tickets for the Hyde Park concert will be available through a special text lottery, details of which will be announced on Monday 6 June through the media.
The line-up for the Philadelphia show will include Stevie Wonder, Bon Jovi, Will Smith and Jay-Z.
The bill for the Berlin show will feature A-Ha, Crosby, Stills and Nash, Lauryn Hill and Brian Wilson.
Duran Duran and Faith Hill are among the musicians who will play at the Rome concert.
In Paris Jamiroquai, Craig David and Youssou N'Dour will be among those taking part.