Wow!
Congrats! You are so lucky and deserving to have that kind of interview to be real! Do a great job for all the ones not so lucky and makes us as proud for you as we can be! Just remember if it was easy, everyone would have one coming too! Knock em dead, and if you get over wrought during just picture each of them on the pot in your mind's eye. Remember when you were not doing so well and were looking so capable on the job and were drinking nights? Some of them may be as well. Focus on your strengths, and the frailties become minor.
Make your luck, and make it good!