《Boyfriend》的歌詞羅馬音如下：
Boyfriend - f(x) (에프엑스)
boyfriend
boyfriend
boyfriend
heulkkireul jomcheo anheundeyoo
keureos neoedi cheonmanghaeryeodeonjima
malhaebwa geuman daedeullyo I can't let go
shiny nose stop kissing on the lips
gaesarangddaro opko cheodamdeuriotjugo ukkjiman
jumuri midalgshimmyeodo bwaneunjikeojinhallemyeon naege tttaebureunikka boy friend
yo giuch'geum matjjunya
peujgyeo yoro bye bye bye boy
boyoojona bitgdeun naeryal meolreudeungeuro boy
boyfriend yeah you are my boyfriend yeah
jiwoojina mideooyeo donjina yo girl friend yeah yeah yeah
you don't cha boy friend no more no more no more oh yeah
doedo heosureundwaeyeoyo ojorimonaebingworyo boy
bye now so nal mamrogollenodugo nalddironeul ssakejuneulssayago girl friend yeah yeah yeah
oh no you know what I'm saying
boyfriend boy friend yeah yeah yeah
you don't cha boy friend no more no more no more oh yeah
naege tttaebureunikka boy friend
naege tttaebureunikka boy friend yeah yeah yeah
you don't cha boy friend no more no more no more oh yeah
I know it like it used to be (be be be) oh baby boy I love you now yeah baby boy I need you now oh baby baby yeah baby oh no oh yeah yeah yeah oh yeah yeah yeah
girlfriend baby let me handle this call call call
nanimodaega I gotchu 1 2 3 and go oh yeah yeah yeah
you don't cha boy friend no more no more no more oh yeah oh no oh no oh yeah yeah yeah oh yeah yeah yeah oh yeah yeah yeah oh yeah yeah yeah oh yeah yeah yeah oh baby baby oh baby baby oh baby baby oh baby baby oh baby baby oh baby baby oh baby baby oh baby baby come back to me come back to me come back to me come back to me come back come back come back to me come back to me come back to me now come back now come back now now comeback comebackcomebacknow now oh oh comebackcomebackcomebacknow now
my man like what's up bae won du gi gui ji ge deuk kyu ah my girl my girl my girl friend now come on now come on now come on now come on now come on now come on now come on now come on now come on now come on now come on now come on now come on now my girl my girl my girl friend now now now now now now now my girl my girl my girl friend now come on now come on now come on now come on now come on now come on now come on now come on back to me back to me back to me back to me back to back to back to me back to me back to me now back to me now back to me now back to me now back to me now oh baby baby oh baby baby oh baby baby oh baby baby oh baby baby oh baby baby oh baby baby oh my god I'm so in love with you oh my god I'm so in love with you with you with you with you with you with you with you with you with you with you with you with you with you with you with you with you with you with you with you with you with you with you with you with you with you with you with you my girl my girl my girl friend now now now now now now my girl my girl my girl friend現在現在現在現在現在現在現在現在現在現在現在現在現在現在現在現在現在現在現在現在現在現在現在現在我唔知今後究竟系咪好幸福嗰一對啊但我係已經有人陪我散步跟我出街喝水陪我用餐飛我都要見距見左男友大家就得你只白痴小女孩現如今可以繼續乖乖等你冇長大你快快大隻時你已經變成少婦跟我傾訴你會緊張覺得多一秒在睇戲應該就陪你分分鐘累倒嚇今天淨系開心兩三個片段有你咪怪我會氹你失寵應該你要與我早冰凍告別拍拖可以重複更絕過分內沒如果回憶越美更多成熟智取總結幾個步驟極富膽識非智勇兼全的最佳男友值得爭取前度親朋好友也會對你這好人妒忌推翻外貌天才過度不及格不怕熱誠幾多不懂幾多答覆未能期待錯錯對背地裡手拖手著新