Kendra Wilkinson performs an "amazing striptease" in a new sex tape.

The former Playboy model is set to become the unwilling star of an X-rated DVD - which she filmed before she was famous - and sources who have seen it say it's extremely raunchy.

One said: "When I saw it, I was shocked. I mean, I just was shocked to see a Kendra Wilkinson sex tape, but it was obvious and clear to me that it was in fact her.

"Part of the tape is an amazing striptease from her, and then at the end of the tape she blows a kiss to the camera. It is very, very sexual, and she is just a beautiful woman. It's hot, definitely hot."

Because of the clear footage and erotic content, the tape is predicted to become a huge hit.

The source added to America's OK! magazine: "This tape is sexually explicit. It's hot and she's hot. It's going to be a massive seller."

The footage was obtained by porn distributors Vivid who plan to release the DVD, entitled 'Kendra Exposed', by the end of the month.

The 24-year-old blonde star - who has a four-month-old son, Hank Baskett IV, with her American footballer husband Hank Baskett - is not giving her backing to the tape's release and has reportedly instructed Los Angeles law firm Lavely & Singer to stop the proposed DVD from coming out.

However, Vivid CEO and founder Steve Hirsch is convinced his company has the legal right to bring it out.