Amy Winehouse's mother thinks the singer may have suffered from Tourette's Syndrome.
The late Back to Black hitmaker was nicknamed Hurricane Amy as a youngster for her wild and outspoken ways but Janis Winehouse-Collins is unsure whether she may have been stricken with the neurological disorder, which causes physical and vocal tics.
Janis said: "She could well have been almost Tourette's, where she would just shout things out. We just do not know."
Janis remembers her daughter - who died of alcohol poisoning in July 2011 - as "gifted" and thinks she was too intelligent to "fit in" with her peers as a child.
She told People magazine: "I think that she was a special-needs kid in that she was so intelligent. She was so gifted, living in a world where she just wasn't average, where she didn't quite fit in. But it was a great life lived."