A rep for Joe Jonas has rubbished rumours that he made a sex tape with his girlfriend.

Blind Gossip claim that the singer appears in a video alongside partner Blanda Eggenschwiler as they allegedly perform sex moves, smoke drugs and drink alcohol.

They say that Eggenschwiler "planned the sex tape as a way to bolster her own fame and to make money" and encouraged Jonas to join in, with the full video due to be released on April 3.

However, a rep for the Jonas Brothers star has dismissed the story, telling the Daily Mail:

"There is no truth or validity to this story. It is completely false."

The Jonas Brothers are long associated with sexual morality and famously wore purity rings to show that they were keeping away from sexual activity until marriage.