Avicii vs Nicky Romero have crashed into the Number One spot in the singles chart - but the song behind the latest internet dance craze looks set to be snapping at their heels next week.
The Swedish/Dutch house duo's new entry I Could Be The One topped the chart, but Baauer's Harlem Shake, which is being tipped as the new Gangnam Style, was the week's big mover, going from 22 in midweek to number 3 on Sunday, according to the Official Chart Company.
The song has clocked up millions of listens on YouTube through thousands of "meme" parody videos.
The numerous home-made Harlem Shake parodies by fans are a nod to a New York dance style of the 1980s, and feature unassuming subjects in their bedrooms, lounges and offices bursting into movement when the heavy bassline of Brooklyn-producer Baauer's track kicks in.
Between the two is last week's number one, Macklemore and Ryan Lewis's Thrift Shop.
Martin Talbot, managing director of the Official Charts Company, said: "Harlem Shake's arrival at number three underlines just how quickly this track has turned into a bone fide phenomenon.
"At the start of the week, it wasn't even selling enough to make the Top 20 - but it is now one of the UK's most popular tracks."
Swedish DJ Avicii, real name Tim Bergling, and Dutchman Romero, real name Nick Rotteveel, lent a distinctly European feel to the top of the music charts on Sunday.
Their biggest ever hit topped the singles list while the soundtrack from French Revolution-based Hollywood blockbuster Les Miserables - based on the Victor Hugo novel - retained its grip on the top of the album charts.
It kept Oxford rockers Foals off the top of the chart, although their latest album Holy Fire is their highest charting work so far, beating 2008's Antidotes (number three) and 2010's Total Life Forever (number eight).