A youngster is chopping off her hair to raise money for a charity close to her heart. Nine-year-old Callie McCrea will be braving a haircut in Lynn to donate between 12 and 14 inches to the Little Princess Trust on Friday, July 12. The trim will take place at St Martha’s Catholic Primary School’s summer fete. The charity provides real hair wigs free of charge to children and young adults who have lost their own hair through cancer treatment or to other conditions such as alopecia. Callie was watching an episode of Operation Ouch on TV when she saw a little girl who was given a wig by the Littl…