“She has been seen by her private GP, who supports her decision to take a few days out for rest and recovery. We offer her our ongoing support and wish her a speedy recovery.”

A show source said: “It’s very tough, Susan is emotionally drained – she gave it her all and is absolutely shattered.

“Simon Cowell spoke to her backstage on Saturday night and told her she had everything going for her – a record deal, an American tour. But it’s up to her, she has to see what she wants.

“We do realise that we have a care of duty to look after her.”…

After leaving the spotlight, Susan sank into the arms of producers and buried her head in her hands before starting to cry.