what is Kolaveri Di

"Why This Kolaveri Di" means: Why this murderous rage, girl?

This Is a song from the upcoming Tamil movie 3, which will be released is 2012. This song is composed by Anirudh Ravichander and penned & sung by popular Tamil movie star Dhanush (Venkatesh Prabhu Kasthuri Raja). A promo of this song was released on YouTube on 16th November 2011, and it instantly became viral on social networking sites for its quirky "Tanglish" (Tamil–English) lyrics. Soon, the song became the most searched video on YouTube with 10 million views and counting.