List of UK singles chart number ones of the 2000s

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[3] led to a decrease in record sales and a reduction in the number of copies sold of a No.

[4] Gnarls Barkley's "Crazy" became the first song to reach the top of the charts based on downloads alone in 2006, remaining at No.

[6] Lily Allen made herself known on the Internet through her Myspace page, and following this exposure, her debut single "Smile" peaked at No.

Three years later, her single "The Fear" topped the chart for four consecutive weeks, being the longest running No.

Hear'Say won the original series of Popstars in 2000 and topped the charts with their debut single "Pure and Simple".

These were; "Don't Stop Movin'" by S Club 7 (2001), "Gotta Get thru This" by Daniel Bedingfield (2001–2002), "Call on Me" by Eric Prydz (2004), "Hips Don't Lie" by Shakira featuring Wyclef Jean (2006) and "Boom Boom Pow" (2009) and "I Gotta Feeling" (2009) by the Black Eyed Peas.

In addition, Lady Gaga's "Bad Romance" was number one in December 2009 and climbed back to the top in January 2010.

Madonna, Timbaland and Justin Timberlake's song "4 Minutes", for example, is counted for all three artists because they were credited on the cover, while "Where Is the Love?"

In April 1973, the British Phonographic Industry (BPI) began classifying singles and albums by the number of units shipped.

Westlife had 11 No. 1 singles between 2000 and 2009, including a cover of Phil Collins ' " Against All Odds ", which they released as a duet with Mariah Carey in 2000
Arctic Monkeys scored two number-ones this decade with their debut single, " I Bet You Look Good on the Dancefloor " and " When the Sun Goes Down ", and are one of the first acts to come to the public attention via the Internet.
Britney Spears hit the top spot with " Oops!... I Did It Again " and " Born to Make You Happy " in 2000, and with " Toxic " and " Everytime " in 2004.
American rock band Evanescence debuted at number one with their single " Bring Me To Life " and their album " Fallen " in 2003 and started their massive international success.
Gnarls Barkley 's " Crazy " became the first song to reach number one on downloads alone in 2006 and the first song since 1994 to spend longer than two months at number one.
Leona Lewis saw her debut single, " A Moment Like This ", reach number one in 2006. Two more chart-toppers followed, including " Bleeding Love " which had a 7-week reign at number one in 2007 and " Run " in 2008.
American group The Black Eyed Peas spent six weeks at number one with " Where Is the Love? " in 2003. In 2009, " Boom Boom Pow ", " I Gotta Feeling " and " Meet Me Halfway " also reached the number-one spot.
Sugababes had more number-one singles than any other female act in the 2000s, with six. Their first number-one was " Freak Like Me " in 2002.
Kylie Minogue scored her second number one of the decade with " Can't Get You Out of My Head " in 2001, selling more than 1.1 million copies. It was the biggest-selling single by a female of the 21st century until 2011, when it was surpassed by Adele 's " Someone like You ".
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 .
Lady Gaga became the first female artist to score three number ones in a single year, with " Just Dance ", " Poker Face " and " Bad Romance " all topping the chart in 2009.
Christina Aguilera gained three number-one singles in the 2000s and one in 1999.
Kings of Leon 's " Sex on Fire " sold over 840,000 copies in 2008, making it one of the biggest songs of 2008 and the biggest hit by any American act during the 2000s. It spent a total of 68 weeks in the UK chart.
Rapper Eminem scored 7 number-one hits in 2000s, putting him second behind Westlife for the most number-ones during the decade.
Rihanna had a 10-week run at the top of the UK Singles Chart , along with Jay-Z , with " Umbrella ".
Katy Perry 's " I Kissed a Girl " was one of the best-selling singles in 2008.
Beyoncé scored 6 number ones in the 2000s—two with Destiny's Child and four solo.
Cheryl scored 5 number-ones since the middle of decade; four as a Girls Aloud member and one solo.
Rapper Jay-Z was 15 weeks at the top spot, the most in this decade.
Irish band U2 scored four number-ones in this decade.
Rapper Nelly scored four number-ones this decade.
Mancunian rockers Oasis scored 4 number-ones this decade.
Lily Allen scored two number one singles this decade: " Smile " in 2006 and " The Fear " in 2009, which stayed for four consecutive weeks at the top, being the longest running number one in 2009.
Rap metal band Rage Against the Machine scored the last Christmas number one of the decade and their first UK number one with " Killing in the Name " after a successful Facebook campaign by DJ Jon Morter to stop another The X Factor winner's single dominating the Christmas charts.
Elvis Presley scored four posthumous number ones, in 2002 on Junkie XL 's remix of " A Little Less Conversation ", and then in 2005 with " Jailhouse Rock ", " I Got Stung " and " It's Now or Never " when all his number one singles were reissued and re-released to celebrate fifty years of his music.