That's a gorgeous drawing and exceptionally glamorous style for her. The eyes are especially captivating under the bright lighting. The sparkle in her "expertly tousled" mane make her even more magical. Did she make some glitter out of crushed diamond or sapphire?
I like this style! Only thing I would change is the faces, especially on the Pinkie one, probably also need to be more horse-like to match the rest of the body. Nicely done anyway, reminds me of The Last Unicorn.
Aw so stunning! I love her, she's my favourite - when I saw Pinkie I was really hoping you would do her! Your style actually reminds me of the old MLP Dream Beauties series which were longer and slimmer and more like real horses...and covered in SPARKLES of course! <3 I'd love to see Applebloom done in Nina-style next!