Pentatonix and a young girl with autism perform ‘Hallelujah’ together and it’s simply breathtaking

American a cappella group Pentatonix and Kaylee Rogers, who has autism and ADHD, teamed up for a heart-wrenching performance of the hit song "Hallelujah."

Kaylee shared the stage with the all-star a capella group Pentatonix, from Arlington, Texas, to perform "Hallelujah" by Leonard Cohen on the NBC show "Little Big Shots." Everyone fell silent as the group started singing.

The 11-year-old singing sensation from Northern Ireland was invited to sing on "Little Big Shots."

Follow us on our Twitter account, @amomama_usa, to learn more and scroll down to watch the video below.

Before the performance, Steve Harvey introduced Kaylee to the crowd:

"She's 11 years old, she's from Ireland. Tonight she's performing with one of the best singing groups in the world - the sensational Pentatonix. Give it up for Kaylee!"

The audience gave a huge round of applause as the young girl walked on stage with the members of the three-time Grammy winners, Pentatonix.

Everyone at the "Little Big Shots" theater fell silent as the group began singing.

They really put on an incredible performance. Even Steve was at a loss for words. It was the kind of performance that everyone watching in the audience fell in love with.

Kaylee, who attends Killard House Special School in Co. Down, has discovered that singing helps her manage her conditions, according to Yahoo.

“With the autism she’s quite shy, and when she sings it sort of takes over, and she doesn’t think about anything else,” said Lloyd Scates, her music teacher.

Scates added that Kaylee began to take part in extracurricular activities at the school since she started singing.

Kaylee shot to fame when she performed "Hallelujah" with her school choir last year, which quickly went viral.

Pentatonix insisted on joining Kaylee on stage when the group heard that she was going to perform on "Little Big Shots."

The a cappella group even told their fans that they were very excited to sing with her.