Harivarasanam is the Sacred Lullaby sung to Lord Ayyappa @ Sabarimala.

"The song was written by Kambangudi Kulathur Srinivasa Iyer and Swami Vimochanananda sang it for the first time at Sabarimala.[citation needed] Though there have been many versions of this song sung by many renowned vocalists, the Sabarimala temple plays the rendition by K. J. Yesudas of a musical version composed by the renowned music director G. Devarajan every evening after the final pooja." Source:Wikepedia

The artistes on stage:
Mridangam: Trichur R Mohan
Vocal: Trichur Brothers
Accoustic Guitar: Vedanth Bharadwaj
Keys: Navneeth Sundar
Drums: Shreedhar