The singer divorced footballer Ashley Cole amid rumours that he had been unfaithful, and the contracted potentially-fatal malaria before being criticised for the decisions that she made as a judge on the X-Factor.
And Girls Aloud bandmate Kimberley, 29, has urged people to go easy on Cheryl, saying that if she could, she would take the abuse on behalf of her friend.
She told Now, 'You feel like saying, 'You know what, you have been through enough, let me take this blow instead of you', but you can't. But Cheryl takes everything on the chin.
'In this country [Britain], if you are successful, they can't wait to knock you down. I wish we could champion people who are successful. It's cruel and inhumane to pick on someone who has gone through the things Cheryl has been through in the last year.'