SPB

Recorded 

1. 21 songs in Kannada for composer Upendra Kumar, from 9 am to 9 pm on February 8, 1981. 
2. He has also sung 19 songs in Tamil and 
3. 16 songs in Hindi in a day

https://en.wikipedia.org/wiki/S._P._Balasubrahmanyam

https://www.youtube.com/results?search_query=SPB