Campaigning anti-poverty rockers Bono and Bob Geldof teamed up this week to put pressure on U.S. President George W. Bush ahead of the G-8 summit in Germany. The pair, accompanied by Senegalese singer Youssou N'Dour, discussed efforts to alleviate poverty in the developing world ahead of the meeting of world leaders in Rostock, which kicked off on Wednesday.

In an historic effort to mobilize activism around the human rights atrocities occurring in Darfur, Sudan, more than 50 international recording artists and over 30 record labels have united behind "Instant Karma: The Amnesty International Campaign to Save Darfur."

Grammy Award-winning rock band Green Day will contribute a cover of John Lennon's "Working Class Hero" to the forthcoming CD Instant Karma: The Amnesty International Campaign to Save Darfur. The track will be available for purchase digitally beginning May 1, and will be included on Instant Karma, which will be released by Warner Bros. Records June 12.