Just go over and talk, you liked her personality, right ?
If you're thinking about what to say, try to imagine it from her point of view;
How would it look, theoretically, if a guy you'd spoken to earlier met you later on in the evening, said "hey, (her name) (question either about how her night has been or a funny commentary to something she said earlier) " ?
Don't assign her higher value than yourself, she's not special.
If you're the kind of guy who feel comfortable giving people nicknames, try this: ask her what she think would be her name if she was a stripper...
Then, if she says a name like Cindy, tell her that, no, she looks more like a Rose, or some other cliche stripper name.
Next time you see her, call her by her stripper name.