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

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

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

[Verse 2]
[Zayn]
So c-come on,
Ты 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 Ты light up my world like nobody else,
The way that Ты flip your hair gets me overwhelmed,
But when Ты smile at the ground it ain't hard to tell,
Ты don't know,
Oh oh,
Ты don't know you're beautiful,
If only Ты saw what I can see,
You'll understand why I want Ты so desperately,
Right now I'm looking at Ты and I can't believe,
Ты don't know,
Oh oh,
Ты don't know you're beautiful,
Oh oh,
That's what makes Ты beautiful

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

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

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

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

[Harry]
That's what makes Ты beautiful

[From: link