Nowadays, most teen girls plan their daily outfits to appear years older; thus, it's alarmingly easy to confuse a 16-year-old at the mall for a 25-year-old department store employee. But, if you take heed of the Pretty Little Liars cast member's outfits, you can weed out the tweens from the 21-and-over crowd.

Here's what we learned to avoid: any girl dressed like the photo above, especially near a school, a movie theater and/or a shopping center.