The blond in the last act who looks like Madonna/Gwen Stefani?

She's easily the best-looking woman in the film, but I can't identify her in the credits. Anyone know who she is? She appears several times in the last act, but doesn't have any lines or, at least, not any notable lines.

My 150 (or so) favorite movies:
http://www.imdb.com/list/ls070122364/