Former Another Level singer Dane Bowers was today convicted of assaulting his beauty queen ex-girlfriend.
He said he was acting in self defence when Sophia Cahill was hit on the nose in an incident at his parents' home.
He told Croydon Magistrates' Court he accepted he had made contact when he flailed out during a scuffle but it was accidental.
District Judge Andrew Sweet said: "I am satisfied that he assaulted her in the manner she described."
He adjourned the case for sentencing on October 15 and said the possibility of a prison sentence had not been ruled out.
The court had heard the incident in January happened after the former Miss Wales quizzed him about why he had glitter on his face.
She became suspicious after spotting it as she tried to wake him on January 29 at about 6.30am.
The couple had already split up but were living separately in the home they shared with Bowers' parents in Croydon, south London.
Ms Cahill pointed to the glitter and said "it takes the piss", she told the court at an earlier hearing.
Ms Cahill said Bowers unleashed a violent attack in which he grabbed her by the shoulders, threw her out of a bedroom, hit her in the face, giving her a bloody nose, pulled her hair and squeezed her throat.
Ms Cahill said she had pointed to the glitter on his face.
"I had caught him in bed with somebody (before) - that obviously gave us trust issues.
"We were still living together and we said that if we are still living under the same roof we would not do anything to disrespect each other and do anything with other people.
"He had been out all night and obviously I jumped to conclusions because of other things he has done in the past."
Bowers, 35, who denied one count of assault by beating, said he had been to a circus themed night club the night before - he was trying to help a friend get a job.
He got home at 2 or 3am and spent time talking with his father. His mother was in hospital having had a heart attack.
Bowers said mother-of-two Ms Cahill came into the room where he was sleeping, asking why he was not up, but he had his alarm set, and he was not ready to get up.
Later when he was changing the nappy of the younger child she came into that room and poked him in the head, telling him to stop ignoring her.
He grabbed her by the arms and moved her out of the room. "She came back in, a lot more forceful. She slapped me, and she was pounding me on the chest.
"I grabbed her by the arms, to move her out, and she fell to the floor. We both stumbled, it was like a scuffle, and she did go to the floor. I didn't throw her to the floor."
He tried to get round her, but she was trying to stop him going downstairs.
"That's when I must have hit her on the nose, that was me trying to get away from her."
He denied having punched her, saying: "I still don't know, she said it was a slap. She could have said it was an elbow, or an arm, I couldn't have argued with her."
Asked if there was a lot of blood, he said: "No, I didn't see it, there was a tiny bit of blood on the floor."
Then his father Andrew came out and the situation calmed down.
The judge said he was satisfied that even if Ms Cahill had poked or pushed Bowers in the back of the head, the response she described from him went beyond what could be considered reasonable.
"So I am not satisfied that the issue of self defence is raised," he said.
"I am satisfied that Ms Cahill told the truth, and that Mr Bowers was very angry.
"I am satisfied that he assaulted her in the manner she described. It was a sustained assault, causing her injuries, that took place in the presence of her two children. The charge is proved."
The judge ordered a report to be prepared on Bowers and warned him: "Bearing in mind the nature of this assault, it's an all options report, I'm not ruling out the possibility of a prison sentence."
He renewed Bowers's conditional bail.