<page_title> List of best-selling singles in South Korea </page_title> <section_title> Over 3.5 million copies </section_title> <table> <cell> "Blue" <col_header> Song </col_header> </cell> <cell> 3,564,000 <col_header> Total sales </col_header> </cell> </table>
With over 3.5 million in South Korea, "Blue" is one of the best-selling singles.