Question: 3 is a 2012 Indian Tamil romantic-psychological thriller film written and directed by Aishwarya R. Dhanush in her directorial debut, The film gained high anticipation due to the viral marketing of which song, from the soundtrack of the 2012 Tamil psychological thriller film, "3"?
Sentence (from "Why This Kolaveri Di"): The song is written and sung by Dhanush, and composed by Anirudh Ravichander.
Relevant evidence: No