Place your graham crackers in a food processor and process them into fine crumbs. If using pre-crushed graham crackers, skip this step.
Combine the graham cracker crumbs, softened butter, and sugar in a bowl until well mixed.
Use your hands and press the crust into an ungreased 9x13 pan, making sure the crust is even.
In a large bowl, use an electric beater to beat together the cream cheese and sugar until smooth.
Add the sour cream and beat until combined.
Add the lemon juice and beat until combined. Set the bowl aside.
In a separate bowl, add the whipping cream, vanilla, and powdered sugar, and beat until stiff peaks form.
Use a spatula to fold in the whipped cream mixture into the cream cheese mixture until you don't see streaks.
Spread the batter over the crust evenly.
Use a toothpick to draw out your flag design before refrigerating.
Cover and refrigerate for 4-6 hours or overnight.
Before serving, add the blueberry and cherry pie filling to make the flag design. Top with the edible stars.