<page_title> List of Billboard Hot 100 number-one singles of 2009 </page_title> <section_title> Chart history </section_title> <table> <cell> "Boom Boom Pow" <col_header> Song </col_header> </cell> <cell> "I Gotta Feeling" <col_header> Song </col_header> </cell> </table>
The "Boom Boom Pow" and the "I Gotta Feeling" were the No. 1 singles of 2009.