Thanks to some sleuthing by Gian Song Yim he was able to find some concept art drawn up for Equestria Girls by illustrator/concept artist Rita Lichtwardt (Rita Lux). With 12 years of experience and working with companies from Mattel, Hasbro, Disney and EA to name a few she has been in the industry for awhile.
She's got a few interesting pics on her page related to the series that you'll find after the break, including a pic of all the girls as ponies.
Once more, thanks to Gian Song Yim for sending them in!
Source
Twitter: Calpain
