She's not sure what a bad hair day is.

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As the owner of a head of stick-straight, fine hair, I've heard many a curly-haired girl wistfully wax on about how much she'd love to have my hair. Sure, stick-straight hair is a desirable trait -- unless you have it. Because, if you do, you know that it means a lifetime of bad hair days with your lifeless mane stuck flat to your head. But have no fear, my sisters in limp locks. The old days of teasing your roots and holding everything firmly in place with a blast of Aqua Net are no more. Here are some tips for making your tresses look thicker.