Well mostly tamilians give important to only "Tamil" language. Most of people here dont know better English . So that song is hit as "Masses" like because of its stupid humorous english.
btw, just seen this:
FLASH NEWS: Oxford Dictionary to include the word kolaveri in its 2012 edition.
kolaveri: (noun) Murderous rage (literal or figurative ) towards someone/ something.
kolaveriou s (adjective form) Eg, Tom is in a kolaveriou s mood.
Note: Shruti damn sexy and hot . Awesome babe! :D