Capo on 4th fret sounds best in my opinion.
Am C
Me plus you, I'ma tell you one time
Am C
Me plus you, I'ma tell you one time
Am C
When I met you, my heart went knock knock
Am C
Now them butterflies in my stomach won't stop stop
C Am
And even though it's a struggle, life is all we got
C G
And we gon' keep keep climbin' till the mountain top
C G
Your world, is my world
F G
And my fight, is your fight
C G
My breath is your breath
F C
And your heart, I've got the
One love
F
My one heart
C G
My one life for sure
C
Lemme tell you one time
Em
I love you
C Am
Tell you one ti-ime
Am
And I'ma be your one girl
F
You'll be my number one guy
C Am
Always makin time for you
C
I'ma tell you one time
I love you
C Am
Tell you one ti-ime
C
You look so deep
Am C
You know that it humbles me
C Am
You by my side, and troubles them don't trouble me
F Am
Many have called, but the chosen is you
Am C
Whatever you want, I'll give it to you
[ Tab from: https://www.guitartabs.cc/tabs/c/christina_grimmie/one_time_crd.html ]
C G
Your world, is my world
F G
And my fight, is your fight
C G
My breath is your breath
F C
And your heart, I've got the
One love
F
My one heart
C G
My one life for sure
C
Lemme tell you one time
Em
I love you
C Am
Tell you one ti-ime
Am
And I'ma be your one girl
F
You'll be my number one guy
C Am
Always makin time for you
C
I'ma tell you one time
I love you
C Am
Tell you one ti-ime
Am
Right there
C F
He's got everything I need
C Am
And I'm gon' tell him one time
Am
One time
C
Down to my last dime
Am C
He makes me happy
F Em
I know where I'll be
Am C
Right by, your side cause
C Am E
He is the oo-one
C
Cause you're my one guy
Am
You'll be my number one girl
C Am
Always makin' time for you
C
I'ma tell you one time
I love you
C Am
Tell you one ti-ime
Am
And I'ma be your one girl
F
You'll be my number one guy
C Am
Always makin time for you
C
I'ma tell you one time
I love you
C Am
Tell you one ti-ime
Am C
Me plus you, I'ma tell you one time
Am C
Me plus you, I'ma tell you one time