If It starts stalling put the graphic settings on low or worst. Enjoy… 
Lyrics:
GLaDOS: Well here we are again,
it’s always such a pleasure.
Remember when you tried to kill me twice?
Oh how we laughed and laughed,
Except I wasn’t laughing.
Under the circumstances,
I’ve been shockingly nice.
You want your freedom?
Take it.
That’s what i’m counting on.
I used to want you dead but now I only want you gone.
She was a lot like you,
(maybe not quite as heavy)
Now little Caroline is in here too.
One day they woke me up,
So I could live forever.
It’s such a shame the same will never happen to you.
You’ve got your short sad life left.
That’s what i’m counting on.
I’ll let you get right to it,
Now I only want you gone.
Goodbye my only friend
Oh, did you think I meant you?
That would be funny if it weren’t so sad.
Well you have been replaced,
I don’t need anyone now.
When I deleted you maybe
I’ll stop feeling so sad.
Go make some new disaster,
That’s what i’m counting on.
You’re someone else’s problem,
Now I only want you gone,
Now I only want you gone,
Now I only want you gone…