The Vaishnavite tradition of singing through the night, sometimes for days, with distinct styles for different deities.
Singing through the night about the glory of the gods, mostly in the Vaishnavite tradition, is a very common ritual here. Whenever there is a puja, the household hires a professional group of musicians who perform through the night, sometimes for days and even a week.
There are odes to different deities and very distinct styles of singing. Costumes play a very important part for the lead singers.