I take it that's the all-feminine plural Latinate analog of glitterati, brought to us by Justice Scalia in FCC v. Fox Television. The reason for the all-feminine plural, I take it, is that the offenders at issue in these particular broadcasts were Cher and Nicole Richie. A quick Google search reveals only 8 English-language pages that used the term before the opinion came down. The search also reveals that glitterata Ann Althouse beat me to much of this observation.