For many people, Christmas music is an important part of the holiday season.

But one church congregation was in for a surprise when a “barbershop quartet” showed up to perform at a Christmas service. Before the gentlemen went on stage, the pastor told the congregation that a barbershop quartet’s bus had broken down outside of the church.

He asked everyone if they wanted them to sing. The audience agreed and the pastor called the quartet to the stage. To everyone’s surprise, four young boys appeared on the stage, but what comes out of their mouths is not what you might expect.

The boys begin to lip syncing a famous song called “A Christmas Carol of Love,” and needless to say, the deep voices on the recording don’t really match the bodies they are coming out of on stage.

But the best part of the viral video that has been circulating the internet comes at the 1:15-minute mark when the largest boy begins to sing in a deep bass voice that commands the whole room’s attention.

Over 1.3 million people have watched the video of the boys singing. It has received over 7,000 likes, and the audience who saw the performance live also seemed to be loving it.

They can be heard laughing hysterically throughout the song and applauding the four boys for a job well done at the end.