Getting Ready for Halloween

I need two Halloween costumes this year. One needs to be sweat-friendly, because my sister and I are running a 5k together in Dayton. This will be my first 5k (and possibly only my second time running with anyone besides myself!)... so I'm scared, but excited. And I'll probably walk a fair bit, since I'm not exactly training as hard as I could desire. No matter. This first costume, for running, is apparently going to be a somewhat naughty pirate costume. Including fishnets. My sister picked it out- she's going to be a "naughty nurse" which is fitting for a new RN. Neither costume should be overly risque... after all, we'll have our running clothes on underneath!

My second costume should be equally entertaining. It's not finished yet. And by not finished, I mean not started. But it includes the following materials:

Hot pink felt
black tulle
black net
black lining fabric
various small felt pieces
black sweater
white button-down shirt
black stockings

Any guesses as to what it could be? I'll give a few bonus hints over the weekend.

I will get to wear this costume to a party on the 25th, and again after the run on the 31st. I'm very excited to get to wear it twice!