British pop diva Sophie Ellis-Bextor chatted about her unlikely parallel career as a for-hire party DJ this week and recalled spinning for a Russian oligarch at his Antibes mansion attended by Microsoft billionaire Bill Gates.

"I did a disco for Bill Gates. His dance style is surreal", the Groovejet/Murder on the Dance-floor starlet recalled. "His dancing is unique," she added, "He does a kind of clap to the front and a clap to the back, and a shuffle."

The 32-year-old mother of two's cruel quip came some two years after British psychologist Peter Lovatt published a paper on the phenomenon of 'Dad dancing' based on research he carried out on the dancing techniques of 14,000 people.

Spotting that men aged between 35 and 60 'typically attempt complex moves with limited co-ordination', Dr Lovatt suggested they could be subconsciously spurning nubile 18 year-olds.

"The message their dancing sends out is 'stay away, I'm not fertile'," he told the Daily Telegraph, "It's like an apple that is going brown," he added, "You want a fresh green one instead."