Dance DJ Basshunter has ended X Factor winner Leon Jackson's three-week reign at the top of the singles chart.
Now You're Gone climbed 13 places to hit number one, despite not being played much on the radio, while Leon dropped to five with When You Believe.
Meanwhile, Britney Spears' Piece of Me jumped up the chart for a second week, climbing 17 places to number two.
The only new release to make it into the top 20 was Lupe Fiasco's Superstar, which went straight in at number seven.
In the album chart, Scottish singer-songwriter Amy MacDonald climbed five places with This is The Life to hit the top spot, pushing Radiohead's In Rainbows to number two.