<page_title> List of best-selling singles </page_title> <section_title> 15 million copies or more </section_title> <table> <cell> "In the Summertime" <col_header> Single </col_header> </cell> <cell> 30 <col_header> Sales (in millions) </col_header> </cell> </table>
In the Summertime was the best-selling single with 30 million copies.