[Verse 1]
[Liam]
You're insecure,
Don't know what for,
You're turning heads when toi walk through the door,
Don't need make-up,
To cover up,
Being the way that toi are is enough,

[Bridge]
[Harry]
Everyone else in the room can see it,
Everyone else but you,

[Chorus]
[All]
Baby toi light up my world like nobody else,
The way that toi flip your hair gets me overwhelmed,
But when toi smile at the ground it ain't hard to tell,
toi don't know,
Oh oh,
toi don't know you're beautiful,
If only toi saw what I can see,
You'll understand why I want toi so desperately,
Right now I'm looking at toi and I can't believe,
toi don't know,
Oh oh,
toi don't know you're beautiful,
Oh oh,
That's what makes toi beautiful

[Verse 2]
[Zayn]
So c-come on,
toi got it wrong,
To prove I'm right,
I put it in a song,
I don't know why,
You're being shy,
And turn away when I look into your eye eye eyes,

[Bridge]
[Harry]
Everyone else in the room can see it,
Everyone else but you,

[Chorus]
[All]
Baby toi light up my world like nobody else,
The way that toi flip your hair gets me overwhelmed,
But when toi smile at the ground it ain't hard to tell,
toi don't know,
Oh oh,
toi don't know you're beautiful,
If only toi saw what I can see,
You'll understand why I want toi so desperately,
Right now I'm looking at toi and I can't believe,
toi don't know,
Oh oh,
toi don't know you're beautiful,
Oh oh,
That's what makes toi beautiful

Na Na Na Na Na Na Na Na Na Na
Na Na Na Na Na Na [x2]

[Middle 8]
[Harry]
Baby toi light up my world like nobody else,
The way that toi flip your hair gets me overwhelmed,
But when toi smile at the ground it ain't hard to tell,

[All]
toi don't know,
Oh oh,
toi don't know you're beautiful,

[Chorus]
[All]
Baby toi light up my world like nobody else,
The way that toi flip your hair gets me overwhelmed,
But when toi smile at the ground it ain't hard to tell,
toi don't know,
Oh oh,
toi don't know you're beautiful ([Harry:] Oh),
If only toi saw what I can see,
You'll understand why I want toi so desperately ([Harry] desperately),
Right now I'm looking at toi and I can't believe,
toi don't know,
Oh oh,
toi don't know you're beautiful,
Oh oh,
toi don't know you're beautiful ([Harry] beautiful),
Oh oh,

[Harry]
That's what makes toi beautiful

[From: link