Tulisa Contostavlos has admitted that she is the person in the sex tape she has previously asserted was "100% fake".
The X Factor judge made the unexpected admission in a YouTube video posted on Twitter.
The seven-minute tape, which shows a blonde woman performing a sex act, briefly appeared online, but was removed under instruction from the star's lawyers.
However, in an online confession, Tulisa admitted that it is her in the tape. "To set the record straight", she said, "it is me and an ex-boyfriend sharing an intimate moment."
Tulisa alleges that the man in the tape as "Justin Edwards, AKA Ultra".
The judge shows pictures of her ex-boyfriend, who she said she was dating from the age of 17.
"I loved him deeply," she said, however admitted that the tape's emergence was "not unexpected".
"As you can imagine I'm devastated," she said. "When you share an intimate moment with someone you care about, you love, you trust, you don't think that moment will be shared with the rest of the UK."
"It's out there now, there's nothing I can do about it, but I had to deal with it."
Tulisa ends the tape by apologising to anyone that the tape "has offended".
An hour after the confession went public, Edwards posted the following on his Twitter account:
He later follwed it up the next day saying: "To find the truth both sides of the story should be heard b4 passing judgement #thatisall"
> IN PICS: TULISA'S AMERICAN ADVENTURE
Tulisa arrived in LA at the beginning of February to record her debut album (Pic: WENN)
And only a few days in to her trip, she was doing a Katie Price and getting her hair seen to by top US stylists (Pic: WENN)
Getting her extennos sorted. (Pic: WENN)
In between recording sessions there was enough time to hit the town. (Pic: WENN)
Tulisa was all smiles on the trip despite her recent love split from boyfriend Fazer. (Pic: WENN)
But she batted off the attention of admirers at a pre-Grammys party. (Pic: WENN)
On her way out of the studio. (Pic: WENN)
Tulisa's style offensive was also much talked about as she showed off a stylish American wardrobe. (Pic: WENN)
Tulisa is so LA now she wears sunnies in the dark. (Pic: WENN)
On Valentine's Day Tulisa headed straight out on the town after leaving the studio. (Pic: WENN)
Partying with pals, it was a case of Fazer who? (Pic: Twitter)
Never far from her side was her PA and best mate Gareth Varey who also had a tattoo of her name done in his leg during their trip. (Pic: WENN)
And bumped into former <em>TOWIE</em> star Mark Wright. (Pic: Twitter)
With debut single <em>We Are Young</em> in the can, it was time to film the video. (Pic: Splash)
That's a lot of luggage there dear! (Pic: Splash)
Getting cheeky on the shoot. (Pic: Splash)
And of course Gareth had to get in on the action in the video as Tulisa showed off her curves in a swimsuit. (Pic: WENN)