Oh my, I fail at not drawing ponies lately... I was working on a request older than 2 1/2 years when suddenly Pinkie Pie happened. And now it's 2am...
Why would you do that, Miss Pie?!
The outfit was fun to draw and came naturally while sketching - some weird combo, but I'm certain she'd wear it, lol.
Here's the super-beautiful sketch: [link]