Bono is making the rounds this week, meeting with European world leaders to talk about humanitarian causes.
The U2 rocker and founder of the charity, ONE International, spent time in France, Germany and England. It's all part of Bono's campaign trail with ONE, part of a coalition calling for greater transparency within gas and oil companies. He hit the trail with Microsoft co-founder and philanthropist Bill Gates.
Bono started off the week on Monday with German President Joachim Gauck in Berlin alongside youth ambassadors of his ONE organization.
He met with European Council President Herman Van Rompuy at the EU Council in Brussels on Tuesday and sat down with French President Francois Hollande at the Elysee Palace in Paris the following day.
And on Thursday, Bono and British Deputy Prime Minister Nick Clegg teamed up in London to discuss international development issues. While there, Bono and Clegg spoke about the move to enforce stricter rules involving oil, mining and gas companies. There's a push to make firms publish what they pay to governments around the world.
"There need to be strict new rules about how payments to developing countries from the oil, gas and mining industries are recorded," Clegg said.
"Sometimes great things happen when nobody's looking," Bono said after meeting with Clegg, according to the ONE website. "That's what happened today. Nick Clegg and Jo Swinson have thrown Britain's weight behind strong EU transparency laws, at least matching the new U.S. legislation. This legislation says -- let the daylight in. Transparency is the best vaccine against corruption."