Exclusive: Kendall & Kylie Jenner Reveal Their Defining Style Moments

It's hard to believe that Kendall and Kylie Jenner are still teens — 19 and 17 years old, to be exact — but, given the whirlwind life they were born into, their personal style evolutions and burgeoning careers don't really seem that unusual. Until, of course, you take a step back and realize that...they're teenagers. Teens who happen to have more than one fashion line under their belt. And, whose latest splurges include matching, green-and-white-striped Céline bags they gifted each other. "They’re so sick," Kendall told us. But, I digress.

And, in case you didn't know, before there was Topshop, there was PacSun. In fact, the duo just so happen to have launched their latest summer collection for the brand this weekend in L.A., where we got to sit down with them to talk all things style. Don't let the age fool you: There is nothing minor about their fashion past. To prove it, we had the sisters walk us through some of our favorite Jenner style moments.

The looks they love, the ones they wish they could do over, and more, ahead.