Garcia Goodbye promised to visit the finder of the balloon that completed the longest journey.
Singer Tommy Gontie, who hit on the idea, says that the plan was that the balloons would come down in the neighbourhood.
The wind decided otherwise. The furthest balloon came down in Denmark - 800 km from the launch. Two youngsters found a USB stick on their way to school.
The group held good its promise and visited the Danes. Coldplay posted the video that the Belgians made of their trip on their website.