Here is the famous Christmas carol Carol of Bells melody with 4 part harmony Maha mantra (1 min video)
âThe devotees of the Supreme Lord, or the persons who are in Ká¹á¹£á¹a consciousness, are called santas, and they are always in love with the Lordâ- Srila Prabhupadas purport to Bhagavad-gÄ«tÄ 3.13
Watch it here: https://goo.gl/5nxPWS