A 13-year-old Billings girl who was struck by a car while training for a half-marathon is now preparing to run a full marathon, crediting music therapy as a turning point in her recovery.Hear her story below: Billings teen hit by car trains for marathon after music therapyMaezie Brewer was hit by a car on Broadwater Avenue in May of last year. She spent four nights and five days at St. Vincent's Regional Hospital in Billings with severe injuries…