first 2010 number one song
... that the first 2010 number one song on the US Hot Dance Club Songs was Lady Gaga's "Bad Romance", a position it held in the last week of 2009, thus spending two consecutive weeks atop the charts?
... that the <b id="mwBfk"><a class="mw-redirect" href="./List_of_number-one_dance_singles_of_2010_(U.S.)" id="mwBfo" rel="mw:WikiLink" title="List of number-one dance singles of 2010 (U.S.)">first 2010 number one song</a></b> on the US <a class="mw-redirect" href="./Hot_Dance_Club_Songs" id="mwBfs" rel="mw:WikiLink" title="Hot Dance Club Songs">Hot Dance Club Songs</a> was <a href="./Lady_Gaga" id="mwBfw" rel="mw:WikiLink" title="Lady Gaga">Lady Gaga</a>'s "<a href="./Bad_Romance" id="mwBf0" rel="mw:WikiLink" title="Bad Romance">Bad Romance</a>", a position it held in the last week of 2009, thus spending two consecutive weeks atop the charts?