what makes pink lemonade pink?!

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Pink lemonade was a drink used for centuries by Native Americans and enjoyed by European colonists during colonial times. It was originally made from crushed red sumac berries, especially those of the species Rhus typhina, and sweetened with maple sugar, but the ingredients were commercially replaced with cheaper ingredients during the 19th century until the sumac industry no longer existed. Now it is simply lemonade that has been colored with pink food coloring and is sometimes made sweeter. Sometimes artificial flavors and colors are used. Natural sources of the pink color, which may also affect taste, include grenadine, cherry juice, red grapefruit juice, grape juice, cranberry juice, strawberry juice, pomegranate juice or other juices. It is a common misconception that the juice from the pink-fleshed Eureka lemon is used to make pink lemonade; actually, the juice is clear, and only the flesh is pink.
The New York Times credited Henry E. "Sanchez" Allott as the inventor of pink lemonade in his obituary:
At 15 he ran away with a circus and fell in love with the lemonade concession. One day while mixing a tub of the orthodox yellow kind he dropped some red cinnamon candies in by mistake. The resulting rose-tinted mixture sold so surprisingly well that he continued to dispense his chance discovery.
However, this is disputed by historian Joe Nickell, who claims that it was Pete Conklin who first invented the drink in 1857 when he used water dyed pink from a horse rider's red tights to make his lemonade.
So answer is unfortunately nowadays food coloring makes it pink.

http://en.wikipedia.org/wiki/Lemonade

theyre both the exact same but pink lemonade has coloring. and i dont know why they do it but it is a little appetizing lol.

Natural food colorings typically used include cranberry juice, grenadine, and crushed strawberries

grenadine.
cause it's pretty.

Colours

I could tell you, but then I would have to kill you.