And organisers fear the Scottish songbird, who has learning difficulties, may not be well enough to sing. "We are working on a day-by-day basis here. This is about someone's health and future," The Sun quoted a show source as saying.
The source further said Susan's chances of making the tour dates were 'very slim indeed', but she may do later shows. Fans have already grabbed thousands of tickets at 32.50 pounds for the upcoming shows. Judge Amanda Holden, however, insisted Susan had 'no underlying mental issues' and was just drained of energy.