Disclaimer : I don't own the Silmarillion and its characters, neither do I for Evanescence's songs (which belong to Evanescence)
Regrets
(Manwë's song after the killing of the two trees)
Gone is the light
Cold and dark again
Is this place where we used to be so happy
Blame it on me
I set Melkor free
Nothing can stop him right now
Now that they're gone
For ever they're destroyed
It seems the world is crashing down and dying
I let you blame it on me
I set Melkor free
I can't do anything to repair this
I thought he was good
I was wrong, and he will soon destroy all the world
We used to know
There's no time to save the living
Our powers are not enough.
And you can blame it on me
All is my fault, forgive me
The world will be destroyed because of me.