Croatian U2 fans are calling on all those who will attend the group's concert on 10 August to use balloons to welcome the Irish band.
The idea's initiator, U2Croatia.net website forum, said today (Fri) the idea was to make an Irish flag across the whole stadium with the balloons.
Everyone should bring one balloon to the concert. All those in the west stands should have green balloons, those in the north and south stands and on the pitch white balloons and those in the eastern stands orange balloons.
The balloons should be prepared but not tied before U2 takes the stage.
During the first song, people should hold the balloons in the air and then release them when the song ends.