The teenager was stabbed in Elmfield Park, Doncaster, on Valentine’s Day after dialling 999 for help.
She was found lying injured and later died in hospital.
More than 200 people took part in two charity walks and a concert to raise money for Casey-Lyanne’s family to cover funeral costs.
Britain’s Got Talent finalists 2 Grand performed at a packed benefit gig in Rossington, where Casey-Lyanne lived.
VIDEO: Click the play button to view the walkers leaving the Styrrup Pub and an interview with landlady Julie Bush.