What key is "One Time" in?

"One Time" by Justin Bieber is in the key of C# with a tempo of 144 BPM. Difficulty: medium.

Is "One Time" easy to play on piano?

This arrangement is rated medium. It requires comfort with chord shapes and basic hand independence. Expect 1-2 weeks of regular practice for a confident performance.

Can I play "One Time" without reading sheet music?

Yes. Our player offers a falling-notes mode (Synthesia-style) and a beginner mode with color-coded keys — both let you play along without reading traditional notation.

How long does it take to learn "One Time" on piano?

2–4 weeks of consistent practice (20–30 min/day) for an intermediate player. Drill the tricky passages in isolation first.

What other songs by Justin Bieber can I play here?

Try "FALL", "DIE IN YOUR ARMS", "U SMILE". All are available in our player with color-coded notes; pick the one matching your level.

Lyrics

Ay, ay, ay, ay, ay, ay, ay, ay.

(CN.C.)Me plus you,

(I’m a tell you one time, plus you, one time, I’m a tell you one time, plus you, one time, I’m a tell you one time, one time, one time.) one time.

When I met you, (A)girl, my heart went knock knock.

Now them but ter (E5)flies in my stom ach won’t stop (E5)stop.

And e ven though (A)it’s a strug gle, love is all we got; so we gon’ keep (E5)keep climb in’ to the moun tain (E5)top.

(Ee (C#m)yo.) Your (A)world is my world, and my (E5)fight is your (B)fight, and my (A)breath is your breath, and your (E5)heart...

And now (B)you’re my (C#m)one love, my one heart, my (B)one life (E)for sure.

Let me tell you (B)one (A)time, (Girl, I love, girl, I love I’m a tell you one (E)time.

(Girl, I love, girl, I love you.) And I’m a be your (C#m)one guy; you’ll (A)be my num ber one girl, al ways (B)mak ing time (E)for you.

I’m a tell you (B)one (A)time, (Girl, I love, girl, I love I’m a tell you one (E)time.

(Girl, I love, girl, I love you.

Hey.) You look so deep; you know that it hum bles me.

You’re by my side, them trou bles, them not trou ble (E5)me.

Man y have called, (A)but the cho sen is you.

(B)What ev er you want, shaw (E5)ty, I give it to (C#m)you.

Your (A)world love you.)

(CN.C.)Shaw ty right there; she’s got ev ’ry thing I need.

And I’m a tell her one time, time, one time.) give you ev ’ry thing you need,

down to my last dime.

(C#m)She makes me (D#dim)hap py.

(E)I know where (F#m)I’ll be, (C#m7)right by your (A6)side; ’cause (CN.C.)she is the one.

And, girl, you’re my (C#m)one love, my one heart, my (B)one life (E)for sure.

Let me tell you (B)one (A)time, (Girl, I love, girl, I love I’m a tell you one (E)time.

(Girl, I love, girl, I love you.) And I’m a be your (C#m)one guy; you’ll (A)be my num ber one girl, al ways (B)mak ing time (E)for you.

I’m a tell you (B)one (A)time, (Girl, I love, girl, I love I’m a tell you one (E)time.

(Girl, I love, girl, I love you.)

(C#m)Me plus you,

(I’m a tell you one (E)me plus you, one (B)time, I’m a tell you one (A)me plus you, one time, I’m a tell you one (E)time, one time, one (B)time.) one time.

One Time by Justin Bieber

4 people have learned this song

Easy piano arrangement in the key of C# at 144 BPM. Difficulty: medium. Color-coded notes — no sheet-reading skill required.

About “One Time”

What key is "One Time" in?: "One Time" by Justin Bieber is in the key of C# with a tempo of 144 BPM. Difficulty: medium.
Is "One Time" easy to play on piano?: This arrangement is rated medium. It requires comfort with chord shapes and basic hand independence. Expect 1-2 weeks of regular practice for a confident performance.
Can I play "One Time" without reading sheet music?: Yes. Our player offers a falling-notes mode (Synthesia-style) and a beginner mode with color-coded keys — both let you play along without reading traditional notation.
How long does it take to learn "One Time" on piano?: 2–4 weeks of consistent practice (20–30 min/day) for an intermediate player. Drill the tricky passages in isolation first.
What other songs by Justin Bieber can I play here?: Try "FALL", "DIE IN YOUR ARMS", "U SMILE". All are available in our player with color-coded notes; pick the one matching your level.