WWW- Just when it seemed a reformed Paris Hilton had put her past troubles behind her, a new sex tape of the heiress has been leaked on the internet.

Despite gaining an injunction earlier this year preventing adult website parisexposed.com from selling a recently-uncovered video of her being filmed having a bubble bath, it seems the footage has now appeared on YouTube and as well as some adult pay-sites.

It shows a naked Hilton enjoying a bubble bath while joking about her past video scandals.

“If you were with us before this is issue number three of the Paris Hilton sex tape,” a male voice jokes from off-camera.

It is unknown who the male voice is that appears in the video with the star.

A toned-down version is available on You Tube while a more explicit edit is said to be widely available on American adult sites.

In the edited take, Paris sits in a bath hosing herself with a shower head as the unknown male films and coaxes her to speak.

The video is reportedly part of a collection of private material that Hilton had kept in a storage vault, but was auctioned off after she forgot to pay the rent.

Still on Hilton and the star is having trouble deciding what gift to get her friend Nicole Richie as nobody knows the sex of the baby.

She said: “I don’t know what to get her. Because most of us don’t know yet what she’s having. She doesn’t know if she’s having a boy or a girl.

“I thought for sure she’d want to know, but she decided to wait.”

Nicole and her fiancé Joel Madden don’t want expensive presents and have asked friends to donate the gifts to their new children’s charity.