In a large bowl, add the sweetened condensed milk and cool whip. Fold together gently until combined. Stir in the pink lemonade concentrate until combined. (If you want the pie a vibrant pink color add a few drops of red food coloring)
Pour mixture into the prepared pie crust. Spread out evenly. Place pie in freezer for 6 hours or overnight.
Cut into slices and serve!
Notes
Nutrition Info: 1 slice (1/8 of pie) = 494 calories / 16 fat / 79 carbs / 5 protein