UK Dance Chart in 2005
... that the longest-running number one of the UK Dance Chart in 2005 was "Hung Up" by Madonna, which spent four weeks at the top of the chart?
... that the longest-running number one of the <b id="mwBQc"><a class="mw-redirect" href="./List_of_number-one_dance_hits_of_2005_(UK)" id="mwBQg" rel="mw:WikiLink" title="List of number-one dance hits of 2005 (UK)">UK Dance Chart in 2005</a></b> was "<a href="./Hung_Up" id="mwBQk" rel="mw:WikiLink" title="Hung Up">Hung Up</a>" by <a class="mw-redirect" href="./Madonna_(entertainer)" id="mwBQo" rel="mw:WikiLink" title="Madonna (entertainer)">Madonna</a>, which spent four weeks at the top of the <a href="./Record_chart" id="mwBQs" rel="mw:WikiLink" title="Record chart">chart</a>?