Ethan & Grayson Dolan Give Their Biggest Fans a Christmas Surprise!

Ethan and Grayson Dolan just gave some of their biggest fans the ultimate holiday surprise!

The twins and social media stars showed up to some lucky fans houses, completely disguised as Christmas carolers.

PHOTOS: Check out the latest pics of the Dolan Twins

When they were about halfway through their song, they revealed their faces and their fans had the best reaction ever!

Not only did the girls get to meet the Dolans, but they also came bearing some exclusive merch!

Watch it all go down in the entire video below…