Longest marathon singing by a choir/group

Longest marathon singing by a choir/group
Who
Durg Bhilai Lifecraft singers
What
31/45 day(s):hour(s):minute(s):second(s)
Where
India (Bhilai)
When
Age Restriction: Applications for this record title will only be accepted if the applicant is 16 years of age or over.
The longest continuous concert by a choral group is 31 hr 45 min, by the Durg - Bhilai Lifecraft singers at the Kalamandir Civic Centre, Bhilai, Chhattisgarh, India from 5 to 6 February 2005. They sang traditional prayers, rather than pop songs.