According to webboard chart, Big Bang topped the charts in the singer category, with the highest piracy statistics.

According to 'C Story', published by the Korean Copyright Commission, last month, there were altogether 4321 cases of online/offline piracy of Big Bang's "Tonight", "Cafe", and other songs.

In 2nd place was IU (3874 cases), 3rd was SG Wannabe (3366 cases), 4th was CN Blue (2313 cases) and 5th was 4minute (1502 cases).

As for the music category, IU's "Good Day" (848 cases), Mighty Mouse's "Tok Tok" (789 cases), Big Bang's "Tonight" (779 cases).

(*Note: Movie piracy statistics were omitted from this translation. Also, although our anti-piracy project here has come to a close, it's good practice to keep in mind that you should support your favourite artistes by buying their albums!)

Source: http://news.nate.com.../20110523n08052
Translation: squishyblob @ WeHeartIU
Credit Bigbangupdates