Heat the water in a microwave for 1 minute.
Pour in the sugar, stir and set aside to let it dissolve.
Blend 15 strawberries until smooth.
Mix the grapefruit juice, lemon juice, strawberry juice and sugar water together until well combined.
Let sit for five minutes to allow the juices to incorporate well.
Slice 5-6 strawberries into thin slices.
Pour the lemonade mixture into the popsicle molds and add the strawberry slices to them.
Place the molds into the freezer and freeze for 4-8 hours.
At the 2-hour mark, place the popsicle sticks into the center of the molds. (After 2 hours of freezing, the lemonade should be fairly frozen, which will keep the sticks from sliding around)
To unmold, run under warm water for 10 seconds.
Enjoy!