When people start to drink a lot - you know, alcohol - that is when is time to go."There is, she explains, a pertinent reason for this. Ever since their single "Cheeky Song (Touch My Bum)" became a hit, drunken fans have chosen to take the song's title literally.Margit laughs maniacally. "Is true! They like to touch their bottoms!" She gets suddenly stern "But this is where I come in to protect them. I never leave their side, no no."Over the next hour or so, within Haagen-Dazs's flagship London restaurant, Margit's daughters are led from one photo opportunity to another, making small talk over the blaring music and sipping daintily from their Manhattan cocktails.

At one point during the evening, a wide-eyed young man approaches me and says, "They're sisters, innit?"They are indeed sisters, twin sisters from Transylvania, and - officially, it seems - currently one of the UK's favourite pop acts. Some people - among them, presumably, the paparazzi - choose to believe him. As it transpires, Farrell doesn't make it, but former children's TV presenter Toby Anstis does, as does one-time Eastender Michelle Gayle and semi-retired It girl Tamara Beckwith. You know, they have no friends, no social life, and so they come to these things and they mix Is healthy, I think.

No?"She steers them expertly through the heaving throng, and deposits them safely on the doorstep of the venue. Before disappearing inside, they must first pose for more snaps. Although this is a rather lowly showbiz affair, the girls' PR circulates the rather fanciful rumour that Hollywood superstar Colin Farrell is on his way. It could be crisps, it could be shampoo, it could be Toilet Duck. "Is all good exposure for them," she tells me ebulliently, while sucking on a long, thin cigar. In addition to her maternal duties, the 49-year-old (originally from Romania, but a resident of Rye, East Sussex, for the past decade) serves as the girls' accountant, choreographer, songwriter and manager. "Also, is important for them to come and be with other people.