Tarja:

In sleep he sang to me
In dreams he came
That voice which calls to me
And speaks my name
And do I dream again?
For now I find
The Phantom of the Opera is there,
Inside my mind 

Marco:

Sing once again with me
Our strange duet
My power over you
Grows stronger yet
And though you turn from me
To glance behind
The Phantom of the opera is there
Inside your mind 

Tarja: 

Those who have seen your face
Draw back in fear
I am the mask you wear

Marco:

It's me they hear

Tarja & Marco:

My/Your spirit and my/your voice
In one combined
The Phantom of the opera is there
Inside my/your mind

Marco:  

In all your fantasies you always knew
That man and mystery

Tarja:

We're both in you

Tarja & Marco:

And in this labrinth
Where night is blind
The Phantom of the opera is here
Inside my mind

Marco:

Sing, my Angel of Music!