[Intro: Seulgi, Irene]

Mmm, yeah

Yeah

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

Oh, gosh so crazy (Oh, gosh)

Yeah, I'm an emotional girl

I fall in love so easily (I fall in love so easily)

Yeah, yeah, yeah, yeah

I like new things, they sparkle

Everyone's like that, right?

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

Peek-a-boo, it's love only when my heart flutters

(La, la, la, la, la)

All my friends yell at me

They say I have a problem

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

[Chorus: All, (Joy)]

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

Peek-peek-a-peek-a-boo

A fox who wants to have fun, that’s me

Peek-peek-a-peek-a-boo

[Verse 2: Yeri, Irene]

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

Let's press the button, hurry like "Kung Fu"

Don't be surprised even if I change my mind

Aren't you attracted to me? Then excuse me

Call me, let's go play all night

Restart a game!

Go forward, roll it, Blanka!

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

Tonight (Let's go)

The playground is popping

No time to be bored

Yeah, yeah, yeah

Go round and round (Ooh)

Everyone is the same

Then we locked eyes

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

Peek-a-boo, this is new, is this love?

La, la, la, la, la

All my friends yell at me

They say I have a problem

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]

Tag, you're it!

It'll be fun, I'll include you here

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

Till the moon hangs on the jungle gym

Let's play, yeah

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

[Bridge: Wendy, Seulgi]

Peek-a-boo, it's strange, you’re different

I stop this game and I look at you again

I'm not afraid, because I just felt

That a new story will begin

(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)

A fox who wants to have fun, that’s me

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

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

Tag, you're it!

It'll be fun, I'll include you here (Yeah, yeah, yeah)

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

Till the moon hangs on the jungle gym

Let's play (Na, na, na, na, ooh)

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

Tag, you're it! (A peek-a-boo, boo, boo)

It'll be fun, I'll include you here (A peek-a-boo, boo, boo)

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

Till the moon hangs on the jungle gym (A peek-a-boo, boo, boo)

Let's play a little more (Yeah, yeah)

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

[Outro: Irene]

Peek-a-boo

Peek-a-boo

Peek-a-boo