That's a song called "Andrea Doria", from a brazilian band called Legião Urbana. That's my favorite brazilian band ever. Translated it to english, so you can understand it.
I sang it all day... Poor neighbors ^^"
Sometimes it seems
That because of believing so much
In everything we thought
It was so right...
We would have the entire world
And even a little more
We could do forest from desert
And diamonds from pieces of glass...
But now I realize
That your smile
Comes different
Almost seems to hurt you...
I didn't wanted to see you like this
I want your strenght
Like it was before
What you have is only yours
And to run away worths nothing
And don't feel anything anymore...
Sometimes it seems
That we just had to improvise
And the world would be
A open book...
Until comes the day
That we tried to be too much
Selling easy
What didn't have price...
I know everything's meaningless
I want to have someone
To talk to
Someone who, after,
Doesn't use what I said
Against me...
Nothing else is going to hurt me
It's because I'm already used to
The wrong road
That I followed
And my own law...
I have what stood
And I have even much luck
As I know you have too...
You can download the song
here.