"O' Holy Night, the stars are brightly shining..." and so begins the gentle carol of reflection that has touched the lives of listeners around the world.

For The Archbishop of York, Dr John Sentamu, it's the carol that lifted his spirits as he lay in a London hospital battling pneumonia. It is also the hymn that inspired a fellow patient to find faith. In Philadelphia it is the song that outreach worker Asteria Vives sang when she took Christmas to the homeless, whilst for singer and songwriter Katie Melua it's the carol that awoke her love of music as an 8 year old child in Belfast. And for Tymara Walker it's the Christmas family favourite which went viral when she sang it on a Washington subway, eventually reaching a worldwide audience of over 5 million.

Featuring choral conductor and composer Bob Chilcott.