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

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

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

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

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

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

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

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

[Harry]
That's what makes wewe beautiful

[From: link