Ever since the orignal "Kolaveri Di" song has been released, several other versions of the number also have hit the web, including one by Sonu Niigaam's son, but the singer does not want to over-expose four-year-old Neevan.

"He is too small, he is just four years old, so he couldn't have done this for himself. As his father, I thought I should record his childhood thing. I want to protect him right now. He is too young to be over-exposed," said the 38-year-old singer who began his singing career at the age of three, joining his father on stage for a Mohammad Rafi song.

Sonu admits he never thought his son's version would become such a rage.

"We did it only for the posterity's sake. We never thought that it will be such a big hit. I knew that if it is put on YouTube, it will have lots of hits, but didn't know that it will become so big," said Sonu at a press conference at the Aamby Valley's annual New Year bash Glitterati 2012.

Sonu came to Mumbai at the age of 19 and after years of struggle, he hit the jackpot with "Sandese aate hain" in "Border" (1997). Two years later, his album "Deewana" became a super hit and later the song "Yeh Dil Deewana" from "Pardes" made him a name to reckon with.

He went on to sing hits like "Kal ho na ho", "Panchhi nadiyan", "Suraj hua maddhham", "Main hoon na", "Saathiya", "Main agar kahoon", "Shukraan allah" and "Jashn e bahara".

Sonu is currently working on an English album, "Spirit Unfolding".