[Verse 1: Yujin, Liz]
Gameun du nun wi seuchyeogan geomeun gieokdeul
Nal ssoabomyeo beotineun nal seo inneun maldeul
But, ooh-ooh-ooh
Duryeopgido han mam han kyeoneun, ooh
Ooh-ooh-ooh
Heunjeok hanaeopsi sarajyeo, ooh
[Pre-Chorus: Leeseo]
Gyeondyeonael su isseo dagawabwa
'Cause I am the—
[Chorus: Wonyoung, Yujin]
Heroine, i sesang soge
Heroine, dan hanappunin
Geujjeum siryeondo pillyohae naegen necessary
Geukkat sangcheoron eorimeopseo, nah, I don't care it
[Refrain: All, Gaeul, Rei]
(Ooh, na-na-na-na) Eojjeol su eopji naneun
(Ooh, na-na-na-na) Eojjeol su eopji naneun
(Ooh, na-na-na-na) Eojjeol su eopji naneun
'Cause I'm the one and only
[Verse 2: Wonyoung, Yujin]
Neoui mame deulji anneun geureon nainde
Nunbit sonjit maltu hana mame deulgesseo
But, ooh-ooh-ooh
Gwaenchana bakkul saenggak eopseo, oh
Ah-ooh-ooh-ooh
Mam ganeun daero hallae 'cause I'm the—
[Chorus: Leeseo, Liz, Rei, Gaeul]
Heroine (Heroine), i sesang soge
Heroine (Yah), dan hanappunin
Geujjeum siryeondo pillyohae naegen necessary
Geukkat sangcheoron eorimeopseo, nah, I don't care it
Haeroun jonjae hanae
Goeroun naega aniya
Pillyohaesseo siryeon ttoneun geureon billeon hana
Singyeong sseuji ana mamkkeot tteodeureobwa, let go (Leggo)
[Refrain: All, Liz, Leeseo]
(Ooh, na-na-na-na) Eojjeol su eopji naneun
(Ooh, na-na-na-na) Eojjeol su eopji naneun (Yeah)
(Ooh, na-na-na-na) Eojjeol su eopji naneun
'Cause I'm the one and only
[Bridge: Yujin, Wonyoung]
Chakgageun ma, hey
I storyneun geujeo nareul wihan geotppun
Nege hagopeun mareun geujeo hana
Don't know if you know it
But you're silly, silly, silly, silly, silly
[Interlude: Rei]
Oh, did I say it out loud?
Um-mm
[Refrain: All, Liz, Leeseo, Gaeul, *Rei*]
(Ooh, na-na-na-na) Eojjeol su eopji naneun
(Ooh, na-na-na-na) Eojjeol su eopji naneun
(Ooh, na-na-na-na) Eojjeol su eopji naneun
'Cause I'm the one and only
(Whatcha' say, yeah-yeah-yeah-yeah)
(Ooh, na-na-na-na) Eojjeol su eopji naneun
(Ooh, na-na-na-na) *Eojjeol su eopji naneun*
(Ooh, na-na-na-na) Eojjeol su eopji naneun
*'Cause I'm the one and only*