showbiz gossip straight to your inbox with the Daily Star's FREE newsletterCheryl has pulled out of an appearance at Birmingham Pride as she grieves for former bandmate Sarah Harding, who tragically died earlier this month.In one emotional post to her Instagram Stories, the Fight For This Love songstress expressed her grief for Sarah as she apologised to her fans for pulling out of the concert.Cheryl wrote: "Saying goodbye to somebody you spent such a massive piece of your life with is like nothing else."My heart is heavy, grief is such a harsh experience and an absolute rollercoaster of emotions, questions without answers and pain without resolve, so tumultuous and constant."She went on: "With that said I am so sorry but I really am not.