I usually use Wikipedia to decide. If the subject is in movies or TV or a "supermodel", she's a Celeb. If she poses nude for magazines and/or internet she's a Babe.
I think if they have branched out into other things/occupations other than flashing tits & vag then they should be considered a celebrity - an example is Katie Price who started out flashing, but, branched into writing, TV work & singing (she may not have been any good at them, but,) is therefore a celeb IMO.
Now this is why I suggested a girl should just stick in the forum she is put in when her thread is created, otherwise you give the mods a headache in moving threads and judging when some model has sufficiently become a celebrity. We should only make that judgement once.
imdb entry should qualify as a celebrity. Like Keeley Hazell for example
Another thing to consider is that some pornstars/glamour models become so well known & famous that they actually become celebrities in their own right - Jenna Jameson for example.
Very famous glamour models are still glamour models though, right?
You're probably right about Danica and Sabine, however I would disagree about Maggie Q. ... she has enough film credits to consider her an actress more than a glamour model imo.
I was confusing Maggie Q. with someone else sorry lol.