The song, which is 10,000 sales ahead of its nearest competitor Rihanna's Take A Bow (Def Jam) despite only being available as a download, was featured as the music to George Sampson's winning dance routine on ITV1 show Britain's Got Talent, which finished last Saturday.
The track re-entered the chart last Sunday at 28, but has shot up this week. It originally reached number 20 hit in 2005, when it was used as the soundbed to a Volkswagen Golf advert.
The same act also looks likely to score a top thirty entry with their Mint Royale-issued Harpy.
Elsewhere on the singles chart, Gabriella Cilmi's Sweet About Me (Island) looks set to enter the top ten on Sunday, while Morrissey's All You Need Is Me (Decca) should challenge for a top twenty placing.
On the albums chart, seven new releases are vying for top twenty entries this Sunday, with Paul Weller's 22 Dreams (Island) likely to top the chart, while The Zutons' You Can Do Anything (Deltasonic), Radiohead's Best Of (Parlophone) and Alphabeat's This Is Alphabeat (Charisma) set to score top ten entries.