Does water help clear acne?

I was talking to my friend today, and we were talking about acne, and she has a flawless face, and I asked her how, she explained that she drinks a lot of water everyday, like 4 bottles a day. I asked her how that helps and she said that just as you eat a lot of chocolate and you break out, the water helps flush out your system and removes impurities. I am wondering if any of you have tried this and if it has worked for you or if it sounds logical.
Does water help clear acne?
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