It was a final concert for a choir director who touched the lives of so many students. Mariana Walker was the choir director at Alvin Junior High School in Texas for 17 years. She had been fighting cancer and entered hospice care at home. That's where dozens of students wanted to give her one last song. They chose Oceans by Hillsong. Walker's family opened the door to the house so the music could pour in. The tribute came just in time. Walker died just minutes after it was over.