Girls Aloud were left shaken when a man evaded security to get into their backstage area on Sunday (03.08.08).
The drunken fan approached the British band minutes before they were due on stage in Cheshire, North West England, and shouted obscenities, before being escorted away by police.
A source told Britain's Daily Mirror newspaper: "It was all pretty dramatic.
The girls were due up on stage in three minutes time when he ran up to them. He'd clearly had too much to drink.
"Somehow he had got backstage, within yards of the group. Luckily their security team intercepted him before he was able to do anything untoward.
But it took three burly guys to bring him down as he was getting really aggressive.
"The girls were total troupers and despite being a bit shaken, they simply went out and gave a brilliant performance like nothing had happened.
"Once they were safely onstage the decision was made to call the police."
The man was later released without charge after "apologising profusely".
This is not the first time the 'Biology' group have had trouble with over-enthusiastic fans.
In May, Sarah Harding was reportedly confronted by a female fan dressed as her in her dressing room.
Last year, the band stepped up security after reportedly acquiring a naked lesbian stalker.