G'day! Here's my little contribution to Starlight Glimmer day, I'm still on time, though it's almost midnight for me, and well… That's one of the reasons it's not colored, the second one is me realizing that I got no colors that would fit.
I always thought Starlight and Aria look alike, so… That's Starlight in Aria's clothes, I really think they could pretty easily swap clothes and hairstyles to confuse people, maybe I'll make a drawing/comic of that later.