I don't mind the idea of a Catgirl (Lesley Gore played her in a cameo in the Adam West series and I love Lesley), despite "The Dark Knight Strikes Again" by Frank Miller (Linkara just finished reviewing it). However...
This costume screams Hot Topic and is a direct tribute to Frank Miller's Catgirl. Ick.
ETA: I only just remembered this. I had a crazy dream last night. It involved tarantulas and a gila monster turning into people. Dad and I were trying to kill them before they turned human. Gila-monster-turned-human boasted about being too poisonous for the spray we were using to kill them and was a jerk. One of the tarantula-turned-humans hit on me. He was sort of cute. Sadly, this is normal fare for my dreams.
It must have been the BBQ ribs from Memorial Day.