Real estate mogul and reality TV star Donald Trump has hit back at reports he hired an underage model to pose naked to promote his vodka line.

The Apprentice producer was accused of using a 17-year-old girl to serve drinks at a Super Bowl party for his alcohol brand Trump Vodka last month - wearing nothing but coloured body paint.

Website TMZ.com reported Chanell Elaine Hallett was photographed working as a nude hostess at the party, and was a week short of her 18th birthday at the time.

But Trump representatives have insisted that the girl was not working at the party - accusing her of turning up to the event uninvited and adopting the same guise as the rest of the hostesses as a publicity stunt.

A spokesman tells TMZ.com, "Trump Vodka outsourced the models through an Arizona-based promotional modeling and marketing agency and neither party was aware of the underage hire. All precautions were taken to ensure all service staff was of legal age, and we do intend to investigate the issue further."

"Given the circumstances, we can only guess that she crashed the event to seek publicity for herself."