One Direction are set to perform on ITV1 show Dancing On Ice next Sunday (5th February) - with reports claiming that security has been tripled for their appearance.
According to The Sun, bosses are expecting a huge number of girls to travel to Elstree studios to see their idols, where the 1D lads will be performing new single One Thing and What Makes You Beautiful at the rink.
A DOI source told the newspaper: "Producers are very concerned that thousands of fans will storm the studios. That cannot be allowed to happen during a live show."
The X Factor band, who are currently in Los Angeles, have been causing chaos since arriving in the US - being mobbed by fans at LAX airport, with girls also camping outside the W Hotel where they are staying.
1D member Harry Styles - who recently split from Caroline Flack - has even caught the eye of Arnold Schwarzenegger's daughter Katherine.
The 22-year old took to Twitter yesterday (29th January) to admit she has a crush on the curly-haired star, posting on her official page: "Just watched my first One Direction video with my cousin and @Harry_Styles is a cutie indeed!"