the song 'wo bu shi f4' is written by jay chou. but the original lyrics was changed because jay wrote stuff like: “我不是F4哈哈,我是个白痴,我不是F4哈哈,我是个笨蛋”, supposedly to tell ppl that zaizai is not like the person everyone thinks he is: prince charming like hua ze lei in meteor garden. it was changed because they think that the lyrics does not fit zaizai's image. actually i think jay is quite sarcastic?hmm maybe because i'm biased towards zaizai.