I'm not even going to START comparing Jennifer to the previous mentioned Galindas. Granted, I've yet to see her in the role, but having seen her in many things, I can assure you she can play the ditz.
Did you ACTUALLY see Urinetown? Hope is quite the flake. I don't know if you were sitting in the same theatre I was.
I also saw her in Pardon My English and she was delightful. She can be ditzy, but still manages to convey enough spunk and goofiness to keep it fresh and interesting. She is little and cute... I say, throw a blonde wig on her and she's PERFECT for Galinda.
Not to mention her voice is so rich and soothing. Her upper range is every bit as glorious as her lower and she has such fluidity. Her voice is much easier on the ears than Kristin's and she can sing circles around Laura Bell Bundy (who's voice, in my opinion, isn't up to par for the role).
"You! You are the worst thing to happen to musical theatre since Andrew Lloyd Webber! And you, well, I just plain don't like you."
~Stewart Gilligan Griffin