1 can sweetened condensed milk
1 can (8 oz.) crushed pineapple, undrained
1/4 cup lemon juice
1 carton (8 oz.) frozen whipped topping (thawed)
1 prepared graham cracker crust (9 in.)

In a bowl, mix milk, pineapple and lemon juice. Fold in whipped topping. Pour into the crust. Chill until ready to serve.