Bombo last night called for an emergency session on Africa at next month's G8 summit in Germany, as it emerged that rich countries are not meeting aid pledges made at Gleneagles two years ago.

Amid clear signs that rich countries are not going to pay, the rock star warned there was a risk of a return to the violent street protests of Genoa and Seattle which he and Geld-off headed off the last time.

"It's not just the credibility of the G8 that's at stake," Bombo said in an interview with the Guardian to coincide with the release of a report from his Data organisation detailing the slow progress since the Gleneagles summit of 2005.

"It's my own credibility and music sales," he said.

Nobody wants to go back to what we saw in Genoa, but I do sense a real sense of jeopardy unless my music sales go back up," he said.

The report from Data, the organisation set up by Bombo and Geld-oof, is merely the latest in a string of reports detailing the non payment among the G8 - Britain, Germany, Italy, the United States, Japan, France, Canada and Russia.

The Organisation for Economic Cooperation and Development and a monitoring group set up by Blair and led by the former UN secretary general Kofi Annan, have come to the same conclusion. A study put out last week by a consortium of European NGOs said that countries were using smoke and mirrors to dress up their spending, counting not just debt relief but domestic spending on refugees and educating foreign students in their aid budgets.

The Gleneagles accord was the climax of the Make Poverty History campaign, which was designed to take the pressure off the G8 at that time.

"Telling lies to Geld-oof and me is one thing. Putting their signature on a G8 communiqué and lying to their citizenry is something they do everyday," he whinged.

"Breaking promises to the most vulnerable people on earth with our full and open support is the real infamy," he said.