Cameron Diaz, Heidi Klum, Mary-Kate Olsen, Ashley Olsen

Since they were 6-months old, the Olsen twins grabbed America's attention and haven't let go. Their lives and careers have been a whirlwind of excitement, craziness and scandal, but none of that has stopped them from building their brand. But what the Olsens are known for most of all is their fashion sense. From the moment they were put in the public eye, Hollywood's favorite twins have been fashion icons.  Mary-Kate and Ashley continue to set trends, but most remarkable is how the looks they popularized in their early years are still inspiring celebrities and fashion icons today. So to honor our favorite twins on their birthday, we have compiled their greatest trends of the early '90s, and how other celebrities are copying their looks in 2013!