With so many winter semi-formals and balls coming up, teens and collegiates need to keep it fresh. Why does everybody look 30 to me these days?? From my 50+ BFF to a friend’s 18-year-old, everyone looks 30! I guess the younger set is trying to look all grown up, but slow your roll! I say keep hairstyles youthful, and save the French updos for later on in life. That’s why I love Hayden Panettiere’s loose waves – they’re fresh and vibrant. If you insist on an updo, style it like Kristen Stewart’s with just a few tendrils dangling around your face. If everything is tightly pulled together, you’ll end up looking stuffy rather than sexy. Jennifer Lawrence’s half updo is pretty, too – her shaggy bangs frame her face so well (not the case with everyone, unfortunately). Nina Dobrev’s sleek, yet full-bodied hair is especially enviable with that cute headband, but I have to say that Liu Wen is rocking my favorite holiday hair. Nothing says youthful and exuberant like a low messy ponytail. If your hair is stick straight and stubborn, use a texturizer to get the casual cool look. I like John Barrett’s Be Hold Styling Balm ($20) – it gives you the messiness without the frizz! Available at John Barrett.