Bono [ tickets ] and Bob Geldolf are challenging French President Nicolas Sarkozy to increase aid to Africa, saying the country has failed to live up to commitments it made at a 2005 summit of leading industrialized countries, according to a Reuters report.

The activist rockers, who were key figures in the Live 8 concerts ahead of the Group of Eight summit, said failure by G8 leaders to keep their promises to the world's poorest was a disgrace; the G8 had agreed to double aid to Africa by 2010.

According to a report by advocacy group DATA, launched by the rockers in Paris last week, the G8 has so far delivered only 14 percent of what was pledged. The DATA report says that of the seven countries that made commitments to Africa, only one country--Italy--is doing worse than France, with a net decrease in aid since 2005.

The rockers apparently singled out France because it is about to take over the rotating European Union presidency and they hope a surge in French aid will prompt the other European members of the G8, Germany, Britain and Italy, to do more as well.