The girl you see in the video is Kaylee Rogers. She attends Killard House, a school for children with special needs. She was diagnosed with autism and ADHD since she was a baby, but even though she is different from other kids, her voice is that of an angel.
When the school’s choir had to prepare a special performance for Christmas, Kaylee was chosen as the primary soloist. How she sang cannot be described with words, the audience started crying before she sang the chorus. Without further ado, it’s best you have a look for yourself. And remember, no crying!