Cheryl Cole has pulled out of next month's V Festival to continue her battle against malaria.
The 27-year-old singer was diagnosed with the disease last week and is currently being treated in a private clinic.
Her spokeswoman said Cole would also miss the boot camp stage of The X Factor.
"Cheryl Cole is making good progress but following medical advice she will not be able to take part in X Factor's boot camp stage or perform at V," her spokeswoman said.
Cole is believed to have contracted the disease on a break in Africa last month, despite taking malaria tablets.
Organisers of V Festival had been optimistic that the singer would be able to take part in the festival, which takes in Staffordshire and Chelmsford on August 21 and 22.
For more information about V Festival and all this summer's festivals, check out the Gigwise Festival Guide.