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Once upon a time Lindsay was a Plastic, and Ali is her baby sister, so we can call her Baby Plastic, right?

The 15-year-old aspiring celeb was snapped in Hawaii yesterday, and instead of rocking a one piece like Linds, Ali showed off her curves in a striped bikini. Yeah, we can't believe our eyes either...Ali looks like a 25-year-old FHM model, not a high school sophomore...