LONDON Sugababes and Girls Aloud knocked Take That off the top spot in the singles chart on Sunday with their Comic Relief collaboration "Walk This Way".
Their charity cover of the classic Run DMC/Aerosmith rock-rap crossover reached number one in its first week, the Official UK Charts Company said.
Comic Relief narrowly missed taking the top two spots.
U.S. singer Gwen Stefani held onto second place, ahead of the second charity single "I'm Gonna Be (500 Miles)" by The Proclaimers with comedians Peter Kay and Matt Lucas.
The two fundraisers were performed on the BBC on Friday for the annual Red Nose Day events which raised more than 40 million pounds for charities in Britain and Africa.
Elsewhere on the chart, Take That slipped to fourth with "Patience" while U.S. band The Fray stayed at number five with "How to Save a Life".
Slipping three places to six was "Ruby" by Leeds band Kaiser Chiefs.
Singer-songwriter Mika was another faller at seven with his former number one "Grace Kelly" while U.S. singer Justin Timberlake's "What Goes Around Comes Around" dropped to eight.
Danish singer Camille Jones slipped to nine with "The Creeps", a joint effort with the Dutch DJ Fedde Le Grand.
Completing the top 10 was Scottish dance act Calvin Harris with the single "Acceptable in the 80s".
On the album charts, singer Ray Quinn's "Doing It My Way" was a new entry at number one.
Ben Mills, another former contestant on The X-Factor, was at number three with "Picture of You", behind Take That's "Beautiful World" at two.