Sign outside shop in Soho area advertising the X Factor Judge's sex tape. ITV/BIG Pictures

Tulisa Contostavlos's infamous sex tape has gone on sale in shops in London' seedy Soho area despite the X Factor judge taking out an emergency injunction to ban distribution of the video.

The seven-minute clip, which shows the singer performing a sex act on former boyfriend Justin Edwards, can be bought on DVD in sex shops in central London, according to the Sun and the Mail.

Shortly after the clip surfaced online, Tulisa called in the help of her legal team to obtain a gagging order to get it removed from the web.

The former N-Dubz star has kept a low profile since the leak, speaking out only in a video apology to fans after initially denying that it was her in the clip.

In her YouTube confession, she accused "MC Ultra" Edwards of posting the X-rated video online and said she was devastated and heartbroken.

"When you share an intimate moment with someone you love and trust you never imagine for one minute that footage may at any point be shared with the rest of the UK," she told fans.

Edwards, however, defended himself in court over her claims that it was he who leaked the tape. He claimed in a written statement that she had "persuaded" him to film the intimate moment.

His statement said: "I am disgusted it has been [leaked] and regret ever allowing the claimant to persuade me that we should film ourselves.

"I simply do not, and never have, possessed the film referred to."

Tulisa is seeking damages of up to £100,000 from him over humiliation caused by the leak