U2 is kicking off its tour in Berlin

The multi-millionaire front man was mocked after he claimed celebrating the EU is "transgressor" and "a radical act".

The bizarre gesture is intended as a statement of support for Brussels in the wake of Brexit and Eurosceptic movements around the continent. Bono, who is known for his political activism and charity work, revealed his plans in an article for German newspaper Frankfurter Allgemeine Zeitung. He wrote, "I'm told a rock band is at its best when it’s a little transgressive: when it pushes the bounds of so-called good taste, when it shocks, when it surprises "Well, U2 is kicking off its tour in Berlin this week, and we’ve just had one of our more provocative ideas: during the show we’re going to wave a big, bright, blue EU flag."