Meega, nala kwishta! Ah, Pooama Chicky!
His destructive programming is taking effect. He will be irresistibly drawn to large cities, where he will back up sewers, reverse street signs, and steal everyone's left shoe.
In case you didn't know, the ending song Still Alive, though sang by Ellen McLain (a.k.a.: GLaDOS), it's composed by Jonathan Coulton, a part-time artist/composer and full-time geek. He has composed and interpreted numerous songs, most if not all of humorous and geeky nature.
Here's him performing the famous Portal song:
And here he is again, though this time surrounded by zombies:
You can find more songs in his site, though not all are free. Hope you enjoy them