Hey! I don't know if you know this, but 'Mary, Did You Know?' was originally written by Mark Lowry. Pentatonix only did a cover of it.
Thanks for checking out my post! Feel free to leave any comments or suggestions.PLEASE check the song list before making a suggestion. If your song is popular, it is probably there. Also, PLEASE do not spam the comments with your own song requests. One post is enough.