Many fans travel overseas to see their idols on tour, and tourists commonly visit Korea from Japan and China to see K-pop concerts. A K-pop tour group from Japan had more than 7,000 fans fly to Seoul to meet boy band JYJ in 2012, and during JYJ's concert in Barcelona in 2011, fans from many parts of the world camped overnight to gain entrance. A 2011 survey conducted by the Korean Culture and Information Service reported that there were over 3 million active members of "Hallyu" fan clubs.