Mel B. Picture: Bang Showbiz

Mel B is being investigated by police for allegedly hitting a male model after a fashion show over the weekend.

The 'America's Got Talent' judge was the subject of a complaint from Dujuan Thomas, who visited Los Angeles police on Sunday to complain the 43-year-old star had hit her in the chest on Saturday evening after a fashion show.

According to TMZ, Dujuan had walked the runway and Mel was in the audience, and when he ran into her backstage, he asked the former Spice Girls star to take a photo.

Though Mel agreed to his request, she allegedly lashed out after he asked for another picture because he didn't like the first.

And the model told police he later ran into Mel again at the same hotel, and she allegedly hit him in the chest again when she recognised him.

The website obtained a video of the model following and recording Mel in a hotel corridor as she walked with a group of friends. When they noticed they were being followed, Mel abruptly turned around but the video then stops before any words are exchanged.

Dujuan didn't need medical attention and hasn't reported any injuries, but the case is under investigation and will eventually be transferred over to the LA City Attorney, who will decide whether to pursue a prosecution.

Meanwhile, it was recently revealed Mel has lost an appeal and will face trial for defamation after being sued by her former nanny, Lorraine Gilles, for allegedly branding her a "homewrecker" and a "prostitute" in court papers relating to her divorce from Stephen Belafonte.

The 'Say You'll Be There' singer had argued to the court that she had no choice but to name Lorraine in order to get a restraining order against Stephen - the father of her youngest daughter, seven-year-old Madison - but the court disagreed and sent the case to trial.

Mel - who also has Phoenix, 19, and Angel, 11, from previous relationships - appealed, but the Court of Appeal agreed with the original ruling.

It is not known when the trial will start, but the first hearing in the matter has been set for 4 February, 2019.

Lorraine, who now works as a waitress, is seeking unspecified damages and is suing for libel, invasion of privacy, and intentional infliction of emotional distress.