Crust: combine the graham crackers, sugar, and melted butter. Press into 9-inch springform pan onto bottom of the pan and about 1-inch up the sides. Bake for 8 minutes. Cool to room temperature.Change the oven temperature to 450 degrees F.To make the filling: beat the cream cheese and sugar in mixer on medium-high speed until light and fluffy, about 5 minutes. Reduce the speed of the mixer to medium and add the eggs and egg yolks, 2 at a time, mixing well. Scrape down the bowl and beater, as necessary. On low, add the sour cream, zest, and vanilla. Mix well and pour onto your crust that has cooled.Bake for 15 minutes. Turn the oven temperature down to 225 degrees F and bake for another 1 hour and 15 minutes.