Lyrics:
This was a triumph.
I'm making a note here: HUGE SUCCESS.
It's hard to overstate my satisfaction.
Aperture Science
We do what we must
because we can.
For the good of all of us
Except the ones who are dead.
But there's no sense crying over every mistake,
You just keep on trying till [bad word] out of cake.
And the Science gets done,
And you make a neat gun
For the people who are still alive.
I'm not even angry.
I'm being so sincere right now.
Even though you broke my heart
And killed me.
And tore me to pieces.
And threw every piece into a fire.
As they burned it hurt because I was so happy for you!
Now these points of data make a beautiful line,
And we're out of beta,
We're releasing on time.
So I'm GLaD I got burned.
Think of all the things we learned
for the people who are still alive.
Go ahead and leave me.
I think I prefer to stay inside.
Maybe you'll find someone else to help you.
Maybe Black Mesa...
THAT WAS JOKE.
HA-HA. FAT CHANCE!
Anyway, this cake is great,
It's so delicious and moist.
Look at me still talking
when there's Science to do.
When I look out there, it makes me GLaD I'm not you.
I've experiments [bad word] 
There is research to be done
On the people who are still alive.
And believe me I am still alive.
I'm doing Science and I'm still alive.
I feel FANTASTIC and I'm still alive.
While you're dying I'll be still alive.
And when you're dead I will be still alive.
Still alive.
STILL ALIVE.