I like the concept, it's pretty great, haha.

You did a nice job with the expression, looks good, and the transperancy on the hair to reveal her eye is cool too.

Pinkie's hair from that angle is hard to get right, but it's really well done!

One thing that I'm curious about though, what's the extra line in the eyes for?

But overall, not much to say about this, looks great :]