Pentatonix performing 'Hallelujah' with autistic girl will give you the feels

11-year-old Kaylee Rogers flew all the way from Northern Ireland just to sing on Little Big Shots. Kaylee found that singing helped her manage be autistic and ADHD.

Her music teacher, Lloyd Scates, accompanied Kaylee on the trip and helped explain how singing has helped her. He said, "With the autism, she's quite shy, and when she sings, it sort of takes over, and she doesn't think about anything else. And since she started singing more and more and more in school, she's started to take part in more and more things in school. It's quite spectacular."

Kylee caught the world's attention with an earlier school performance of "Hallelujah," which went viral. And when the a cappella group Pentatonix found out Kaylee was going to be on the show, they insisted on joining her.

Band member Scott Hoying said, "Kaylee's just such a sweet girl. Once we heard her story, we knew we wanted to sing with her. And "Hallelujah" is one of our favorite songs to sing. And the second she started singing, it just brought tears to all our eyes. She is a truly special person and a special talent."

Kaylee and Pentatonix put on a wonderful performance and even got Steve Harvey's feet tapping.