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National Skin Cancer Awareness Month doesn't begin for another couple of weeks. But feel free to get a head start and remind yourself that excessive exposure to the sun isn't just dangerous, it can make you look completely ridiculous, too—even if you're Kim Kardashian and you're plenty ridiculous as it is. "This tan line is not ok!!!" Kim says on Twitter. This is true! But we're glad she shared the pic, and we've all learned a valuable lesson, and for that, Kim, the dermatologists of America salute you. [Twitpic]