"It was chaos. She was due on stage at 4pm on Saturday but at 1pm she arrived with bright red hair and a great big grin," the Sun quoted a source as telling TV Biz. "The grey bits had completely soaked up the colour and were especially vibrant. There was no way she could have gone on stage like that. At one point they considered giving her a wig," the source added.
Boyle finally recorded her song for the show with a darker hairdo than usual.