I read that it was originally titled "F*** You" but they changed it.
Edit: Found it:
Quote:
“Hate You”, the new single that will be released on July 21st, actually has an interesting story behind it.
This song was originally scheduled to be released last September with 2NE1’s first full album, but due to the song’s inappropriate title/lyrics, we decided that it would be best to hold off for the time being.
The original title for “Hate You” was actually “Fu** You”, and we were being cautious because Minzy was still a minor at the time of the song’s inital pending release; also, we did not want to negatively influence in any way the teenage fans who listen to 2NE1. We worked to try and change the song’s title and lyrics, however, there were no substitute words that carried the same emotions as the original, and therefore we decided to postpone the release of the track for an undetermined amount of time.
These situations rise from time to time when working in this field, but in this particular case, this was a song the entire group was really excited about, and so due to their never-ending requests to release the track, we have modified the song’s title to “Hate You” and have added it to their new mini-album.