Dronfield pianist Robert Wolstenholme raised more than £700 for the National Autistic Society when he entertained shoppers at Crystal Peaks.
Robert, who is 17 and autistic himself, played for more than five hours.
The Henry Fanshawe School sixth former raised £764.67 - topping the £664.72 he raised last time he performed at the shopping centre.
Robert recently attained distinction at grade seven with the London College of Music.
He will next perform at Crystal Peaks on September 6.