[Intro: Seulgi, Irene]

Mmm, yeah

Yeah

[Verse 1: Seulgi, Irene, Both, Wendy]

Oh gosh, nalliya (Oh gosh)

Maja nan jom gibunpa

He geumbang tto sarange ppajyeo (he geumbang tto sarange ppajyeo)

Yeah, yeah, yeah, yeah

Saegeonman joahaeyo

Banjjakgeorijyo

Dadeul geureochanayo matjyo

[Pre-Chorus: Yeri, (All), Joy, Wendy]

Peek-a-boo, seollel ttaeman saranginikka

(La, la, la, la, la)

Nae chingu modu sorichyeo

Neon jeongmal munjeya

I'm fine, fine, fine, fine, fine, fine

[Chorus: All, (Joy)]

Peek-peek-a-peek-a-boo (Ow)

Peek-peek-a-peek-a-boo

Heung-heungi nan yeou geu-geureon naragu

Peek-peek-a-peek-a-boo

[Verse 2: Yeri, Irene]

I said one, two, three, play the game again

Beoteuneul nulleoboja kungpumankeum ppalli

Junggane nae mam byeonhaedo nollaji malgi

Hoksi kkeulliji anni geureom excuse me

Ja jeonhwahaeyo bamsae

Tto nolleo gayo hamkke

Restart a game

Doljinhae rollinghae beullangka

[Verse 3: Wendy, Yeri, Seulgi, Joy]

Oneul jeonyeokdo (Let's go)

Noriteoneun bumbigo

Jiruhaejil teumjocha eopjyo

Yeah, yeah, yeah

Binggeulbinggeul dorayo (Ooh)

Dadeul ttokgatjyo

O machimnae majuchin nunbit

[Pre-Chorus: Irene, All, Seulgi, (Joy), Wendy]

Peek-a-boo, saerowoyo sarangingayo

La, la, la, la, la

Nae chingu modu sorichyeo (modu sorichyeo neon)

Neon jeongmal munjeya

I'm fine, fine, fine, fine, fine, fine

[Chorus: All, (Yeri)]

(My boo, boo, boo, peek-a-boo, boo, boo, boo)

Peek-peek-a-peek-a-boo

Peek-peek-a-peek-a-boo

Peek-peek-a-peek-a-boo

[Post-Chorus: All, Wendy]

Sullaeneun neoro jeonghaejyeosseo

Jaemisseul geoya kkiwo julge

(Peek-peek-a-peek-a-boo)

Jeo dari jeonggeuljime geollil

Sigankkaji noneun geoya, yeah

(Peek-peek-a-peek-a-boo)

[Bridge: Wendy, Seulgi]

Peek-a-boo, isanghae eora neon jom dalla

Ireon geim meomchugo neoreul dasi boge dwae

Museopji ana nan saeroun yaegiga

Pyeolchyeojil georaneun geol banggeum neukkyeosseunikka

(Yeah, yeah, yeah, yeah, yeah, yeah)

[Chorus: All, Wendy, Joy, Seulgi]

Peek-peek-a-peek-a-boo (Yeah, yeah, yeah, yeah)

Peek-peek-a-peek-a-boo (La, la, la, la, la)

Heung-heungi nan yeou geu-geureon naragu

La, la, peek-a-boo (No, no, no)

[Post-Chorus: All, Wendy, Joy, Seulgi]

Sullaeneun neoro jeonghaejyeosseo

Jaemisseul geoya kkiwo julge (Yeah, yeah, yeah)

(Peek-peek-a-peek-a-boo)

Jeo dari jeonggeuljime geollil

Sigankkaji noneun geoya (Na, na, na, na, ooh)

(Peek-peek-a-peek-a-boo)

Sullaeneun neoro jeonghaejyeosseo (A peek-a-boo, boo, boo)

Jaemisseul geoya nega joa (A peek-a-boo, boo, boo)

(Peek-peek-a-peek-a-boo)

Jeo dari jeonggeuljime (A peek-a-boo, boo, boo)

Geollil siganijiman deo nolja (Yeah, yeah)

(Peek-peek-a-peek-a-boo)

[Outro: Irene]

Peek-a-boo

Peek-a-boo

Peek-a-boo