'Sooo f---in cute!!!'
In a not-safe-for-Mouse-House tweet, Cardi gushed, "This is sooo f---in cute!!! love! especially cause my kid knows The song. I love this."
ABC released a sneak peek of the performance on Monday night (Nov. 23), in which the siblings look like they just stepped out of kingdom of Arendelle in matching baby blue jackets. The duo took turns singing the heart-swelling song while slipping a top hat and scarf on their snowman, their voices rising angelically as the snow begins to fall.