Stephanie, I have to disagree with you on two issues:
1) Rianna IS a woman. She was not born female, and you can make the case that she will never be female (even if the hardware is changed, the genetics isn't). But she has always been a girl/woman, because her brain says so!
2) your distinction between crossdresser/transvestite is OLD and OUTDATED. They mean the same. You just don't like it that way.
Labels are useful, but only if we are in agreement on what words mean. I have posted a few objections to the hijacking of the word "transgendered" from the umbrella term to specifically those crossdressers who identify internally as feminine. I have always used the word as the umbrella term, but I think I'm losing the argument. As a pleasure dresser, I am very much different than an identity dresser, but we're both just crossdressers without further disctinction. It still peeves me that some people here who should know better still think we all dress for the same reason, because we feel all femmy inside. We don't. Some dress for pleasure, some for comfort, and some for identity, and maybe some for other reasons (entertainment...). So if the word "transgendered" changes over time, as people use it more to mean something other than the umbrella term, I can adapt. You should, too, Stephanie, and get with the majority of people who use crossdresser/transvestite interchangibly.