What to wear: Ellie may be young, but she's more in the loop than you might think. To dress like this You star, wear a casual and cute outfit (think: something you would wear in high school on a day when you knew you were going to see your crush). Ellie rocks cool sneakers, graphic tees, and jean shorts, and usually completes her look with a backpack or flannel around her waist. Lightly curl your hair, and get ready to keep an eye on everything that's going down.