Russian cosplayer Irina Ushenina goes by the name Rei-Doll. She has costumes for a variety of characters from all fictional genres, although you can tell she's particularly fond of Batman characters, as she portrays the Joker, Catwoman, Harley Quinn, and Poison Ivy.
However, she also does characters from Disney, manga, science fiction, and more. See a selection of Rei-Doll's impressive cosplay portraits at TVOM.