INTRO)
Oh oh oh oh oh
Oh oh oh oh oh
Oh oh oh oh oh
[YURI]kanpeki na bad girl
Oh oh oh oh oh
Oh oh oh oh oh
Oh oh oh oh oh
[SEOHYUN]kanpeki na bad girl yo

(VERSE I)
[TIFFANY]Watashi no secret, *teita nara
anata wa sou kitto, odorokun janai?
[SOOYOUNG]donna jidai mo, kagayaku my style
hoka no dare ni mo mane dekinai wa

(CHORUS)
[JESSICA]Kono himitsu, oshiete ageru
[HYOYEON]oshiete ageru
[SUNNY]hora misete ageru (alright)
[TAEYEON]mou kakugo de kiteru?
[SOOYOUNG]mou kakugo de kiteru?
[TIFFANY]sugu toriko ni naru
[SEOHYUN]toriko ni naru

(REFRAIN I)
Oh oh oh oh oh
Oh oh oh oh oh
Oh oh oh oh oh
[SOOYOUNG]kanpeki na bad girl yo
Oh oh oh oh oh
Oh oh oh oh oh
Oh oh oh oh oh
[HYOYEON]kanpeki na bad girl yo
[JESSICA]So tell me whatchu wanna do?

(VERSE II)
[YURI]Souzou ijou no feeling, machi ga inai desho?
watashi dake no rule, futsuu ja iya nano
[SUNNY]muzukashiku nai wa, sunao na dake
anadoranai de yo tada tsuite kite

(CHORUS)
[JESSICA]Kono himitsu, oshiete ageru
[HYOYEON]oshiete ageru
[SUNNY]hora misete ageru (alright)
[TAEYEON]mou kakugo de kiteru?
[SOOYOUNG]mou kakugo de kiteru?
[TIFFANY]sugu toriko ni naru
[SEOHYUN]toriko ni naru

(REFRAIN II)
Oh oh oh oh oh
Oh oh oh oh oh
Oh oh oh oh oh
[JESSICA]kanpeki na bad girl yo
Oh oh oh oh oh
Oh oh oh oh oh
Oh oh oh oh oh
[SUNNY]kanpeki na bad girl yo

[Pre-BRIDGE]
[JESSICA]So tell me whatchu wanna do?
[TIFFANY]Boy whatchu wanna do?
[JESSICA]So tell me whatchu wanna do?
[JESSICA]Oh whatchu wanna do boy, what you wanna want
Tell me what you want

[BRIDGE]
[HYOYEON]Watashi no secret, *teita nara
anata wa sou kitto

(CHORUS)
[JESSICA]Kono himitsu, oshiete ageru
[HYOYEON]oshiete ageru
[SUNNY]hora misete ageru (alright)
[TAEYEON]mou kakugo de kiteru?
[SOOYOUNG]mou kakugo de kiteru?
[TIFFANY]sugu toriko ni naru
[SEOHYUN]toriko ni naru

(LAST REFRAIN)
Oh oh oh oh oh
Oh oh oh oh oh
[SUNNY]hora misete ageru
Oh oh oh oh oh
[TIFFANY]kanpeki na bad girl yo
[TAEYEON]~~~~~~~~
Oh oh oh oh oh
[TIFFANY]sugu toriko ni naru
Oh oh oh oh oh
Oh oh oh oh oh
[SEOHYUN]kanpeki na bad girl yo
[YURI]Souzou ijou no feeling, machi ga inai desho?
Oh oh oh oh oh
[SUNNY]hora misete ageru
Oh oh oh oh oh
Oh oh oh oh oh
[JESSICA]kanpeki na bad girl yo
[TAEYEON]~~~~~~~~
[YOONA]muzukashiku nai wa, sunao na dake
[SOOYOUNG]sugu toriko ni naru
[HYOYEON]kanpeki na bad girl yo