Cheryl has pulled out of her headline slot at Birmingham Pride tomorrow (September 25).The Girls Aloud singer said she was not “emotionally, physically or mentally able to perform”, citing grief over the death of former bandmate Sarah Harding, who passed away earlier this month.In a lengthy post on her Instagram Stories page, Cheryl wrote: “It has been a long and emotionally exhausting 12 months with such twists and turns and I feel now I just need some time to sit with my feelings and process the grief.“Saying goodbye to somebody [you] spent such a massive piece of your life with is like nothing else.