page_title: List of UK Singles Chart number ones of the 2000s
section_title: Number-one singles
hierarchical_section_title: List of UK Singles Chart number ones of the 2000s / Number-one singles
caption_attribution_description: Madonna - Rebel Heart Tour 2015 - Paris 2
context_page_description: The UK Singles Chart is compiled by the Official Charts Company on behalf of the British record industry. In the 2000s the chart week ran from Sunday to Saturday, and the top 40 singles were revealed each Sunday on BBC Radio 1. Before the advent of music downloads, it was based entirely on sales of physical singles from retail outlets, but since 2005 permanent downloads have been included in the chart compilation.
  During the 2000s, 275 singles reached the number-one position on the chart. Over this period, Westlife were the most successful group and music act at reaching the top spot, with 11 number-one singles. Rihanna and Jay-Z's song "Umbrella" spent 10 weeks at number one in 2007, the longest spell at the top of the charts since Wet Wet Wet's 1994 hit "Love Is All Around", which topped the charts for 15 weeks. The Internet allowed music to be heard by vast numbers of people on social networking sites such as YouTube and Myspace; it also increased piracy.
  This and the introduction of the UK Singles Downloads Chart in 2004 led to a decrease in record sales and a reduction in the number of copies sold of a number-one record on the singles chart.
caption: Madonna holds the record for the most number-one singles by a female artist during the decade. She topped the chart for a fifth time in 2008 with "4 Minutes" featuring Justin Timberlake and Timbaland.
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