More than a dozen students went Walker's home after school on Wednesday and sang Hillsong's "Oceans."
Cindi Lee Cooper - Fields recorded the heartwarming moment.
"(Her family) opened the doors so she could hear them sing," said Cooper - Fields. "It was one of the most beautiful gestures I have ever seen. Friends from all ages got together and sang like angels in hopes of her feeling our love and respect we all have for her."
Once the students were done singing, they said a prayer and their final goodbyes.
"The family walked back in the house and within a few minutes she took her last breath," said Cooper - Fields.
Walker died just moments after the song.
"Knowing Mrs.Walker you knew she wasn't going to leave us until the show was over," said Cooper - Fields.
Funeral services for Walker were held on Monday.