Diana Vickers not performing on Mariah Week?

If reports are true, Diana Vickers will not perform on X-Factor tomorrow n night as she has a troath infection, She already had to miss rehersals with Mariah Carey as she could not sing.

If she does not sing it will be the first time a contestant misses a show, even Leona Lewis sang when she has tonsilitis and she sang huge songs - I will always love you & Lady Marmalade.

I dont know what will happen if she does not sing? Hopefully it is just a rumor!