Defeated!

...And when the smoke cleared Catwoman stood victorious, holding Batgirl's mask in her hand! "Why Barbara Gordon," she purred, "YOU are Batgirl? Purrrfect..."

(Created by one of my oldest unmasking comrades, BatMad, back when the address at the bottom of the page was the place for unmaskers to be. His stuff, including his other obsession with boots, can be found at: batmad.deviantart.com and friendfeed.com/batmad  )