Pentatonix - Mary, Did You Know? Video Wiki
"Mary, Did You Know?" is a Christmas song with lyrics written by Mark Lowry and music written by Buddy Greene. It was originally recorded by Christian recording artist Michael English on his self-titled debut solo album in 1991 (English and Lowry were both members of the Gaither Vocal Band at the time). It reached No. 6 on CCM Magazine's AC Chart. Lowry would record the song several times himself, most notably with the Gaither Vocal Band on their 1998 Christmas album Still the Greatest Story Ever Told.
The song has since gone on to become a modern Christmas classic, being recorded by many artists over the years across multiple genres..