Acapella sensation Pentatonix, who have 12 million subscribers with over 2 billion views on YouTube, and have sold nearly 5 million albums in the U.S., paid us a visit to do a little Christmas caroling.

The Grammy winners (and current nominees for their collaboration with Dolly Parton) showed off their crazy amazing vocal abilities by singing the holiday classic ‘God Rest Ye Merry Gentlemen’ with a twist – they upped the tempo to an almost unbelievable pace.

Watch the video above and prepare to be astounded by their skills!

‘A Pentatonix Christmas’ is available now, and they have another cool new project to celebrate -- their own Lego VR (virtual reality) music video.