What song is this chorus from? pujian for answer!

Baby,you light up my world like nobody else
The way that anda flip your hair gets me overwhelmed
But when anda smile at the ground it ain't hard to tell,
anda don't know,oh oh,you don't know your beautiful.
If only anda saw what I could see,
You'd understand why I want anda so desperatly
Right now I'm looking at anda and I can't believe,
anda don't know,oh oh,you don't know your beautiful,oh oh,
But that's what makes anda beautiful.

5 pujian for the right answer.