No Sugar Added Watermelon Lemonade Recipe

I went to whole foods yesterday and wanted a drink. they had three different choices: a green juice (which i could have just made at home, so i passed on it), a yummy orange/pineapple something or another, and a refreshing watermelon limeade. i opted for the watermelon and was blown away with how yummy watermelon juice is immediately i knew i needed to recreate it, but when i got home i found that we didn't have any limes, however we had lemons. so, i decided to make watermelon lemonade instead and when we go to the store next i will.