Preheat oven to 350 F
Mix graham cracker crust with melted butter, press bottom side up on an 7 inch springform pan
Bake crust for 5 minutes, take out and let cool to room temperature
Meanwhile, beat cream cheese, sugar, and extract, then beat in the eggs one at a time, until mixture is smooth
Fold in 1/2 cup of blueberry pie filling into cream cheese mixture then pour mixture into cooled crust
Bake cheesecake for 40 minutes (center will be set), take out and let cool to room temperature then chill for a couple of hours.
Just before serving, top cheesecake with leftover blueberry pie filling and enjoy :D