Trina's oh, so good cheescake

Crust ingredients:

1 1/4 c. crushed graham cracker crumbs
3 tbsp. sugar
1/2 c. butter (melted)
1 tsp. cinnamon

Combine, shaping into crust over bottom and sides of springform pan.  Bake 
at 375 degrees for 5 minutes.

Lower layer ingredients:

1 1/2 lbs. cream cheese
1 c. sugar
3 eggs
1/2 tsp. vanilla

Cream first 3 ingredients.  Add eggs one at a time.  Beat well, adding 
vanilla.  Pour into crust.  Bake at 375 degrees for 30 minutes.  Cool to 
room temperature (1 hour).  DO NOT REFRIGERATE.

Top layer ingredients:

16 oz. sour cream
3 tbsp. sugar
1/2 tsp. vanilla

Beat well.  Pour into lower filling.  Bake at 400 degrees for 5 minutes.  
Cool to room temperature.

Refrigerate for 24 hours.