The Beatles - "Let it be" with lyrics
ttps://www.youtube.com/watch?v=0D5JJZl6MB0　

In that song "Mother Mary" is mother of Paul McCartney, but some people feel that
"Mother Mary" is the Virgin Mary. Mother of Paul McCartney had been a Christian of
the Catholic Church.

cf.
The New American Bible, Revised edition (NABRE)

Luke 1:38 Mary said, “Behold, I am the handmaid of the Lord.
May it be done to me according to your word.” Then the angel departed from her.