what is the most popular christmas song of all time

"Hark! The Herald Angels Sing" is considered to be the most popular Christmas song of all time. It was written by Charles Wesley in 1739 and has been performed and recorded by numerous artists, including Handel, Mendelssohn, and Paul McCartney. The song has been covered by many different groups, including Pentatonix and The Beach Boys, and it is often sung at Christmas concerts and services. The song's popularity is due in part to its catchy melody and uplifting message, which celebrates the birth of Jesus and the hope it brings to the world.