Best Backstage and Carpet Moments at the People's Choice Awards!

How to Dress Like a Sexy School MarmNow, pay attention, class. You will be tested. If a runway model wears her skirt well past her knee, covers up practically all visible skin on top, but manages to still cause a stir with her stern, yet sophisticated style, what fall trend is she following?

Let's see a show of hands. The correct answer: Dressing like a sassy school marm.

"The long skirt trend is re-emerging because designers realized that not all women can or should dress like Beyoncé in micro-mini, shimmering tight dresses," George Kotsiopoulos, co-host of E!'s "Fashion Police with Joan Rivers" tells StyleList. "This trend is classic and will never go out of style, as it's very flattering on so many women. Oscar de la Renta, for example, does this silhouette every season with great success."

It could be a sign, Nordstrom Fashion Director Gregg Andrews says, that overt sexiness on the runway has hit its limit.

"It's gone about as bare as it could have," he tells StyleList. "The natural cycle of fashion is to cycle back around the other direction. What we end up with is a more pure form of femininity. Last fall it was all about a very strong, very aggressive woman. This fall, it was more about a strongly competent woman who didn't really need to fight. She'd already arrived."