Amy Winehouse’s representative has denied reports the singer has been arrested over allegations of assault - insisting the star is "voluntarily" helping police with their enquiries.

The Rehab hitmaker is alleged to have headbutted a man while drinking in The Good Mixer public house in Camden, north London in the early hours of Wednesday.

She has also been accused of hitting Moroccan musician Mustapha el Mounmi, after he refused to give way to her at a snooker table.

The alleged victim reportedly went to police on Thursday and reported his claim, prompting the police to take action.

But previous reports claiming the star had been arrested on Friday over the incident have proved to be false.

A spokesman for the star has revealed she is due to attend Kentish Town police station in North London on Friday to be quizzed by cops about the case, but will be attending of her own free will.

The representative says, "Amy Winehouse will be voluntarily attending a London police station today by appointment with the police.

"We understand that she will be questioned in connection with an alleged incident in Camden in the early hours of April 23 2008."

Meanwhile, Winehouse’s representatives have also been forced to clear the singer’s name in another incident, which occurred during a night out on Thursday.

The star began her evening at her regular haunt The Good Mixer, before moving on to the Made In Brazil bar.

But the 24-year-old ended the night by being forcibly removed from the venue, with reports claiming she was ejected after being caught taking drugs in the toilet.

A bar employee tells the U.K.’s Sky News, "She was in here last night. She went to the toilets and was gone a long time. When a member of staff went in there they found her in the cubicle with someone and they suspected she was taking drugs.

"We had no choice but to ask her to leave and she was taken outside. We don’t allow drug taking in this establishment."

But Winehouse’s spokesman has hit back at the claims, confirming the star was thrown out of the Made In Brazil bar, but denying she was taking drugs.