It's mentioned in an early scene where we see Lisa sitting down to watch the Anime Channel's "Sailor Moon" marathon: Chapter 3, not quite halfway through:
-- Bob
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Then the horns kicked in...
...and my shoes began to squeak.
Quote:Dunst was Usagi and Richards was Minako; I didn't have anyone in mind for Rei or Makoto.
"Up first, the classic American live action version of the Sailor Moon story from 2000! Starring Kirsten Dunst, Ariana Richards, Lacey Chabert and Geena Davis as Queen Beryl...."
-- Bob
---------
Then the horns kicked in...
...and my shoes began to squeak.