Haven't been able to confirm this on any non-celebrity-based websites yet (the link below is to the Chronicle's "Daily Dish" blog), but many sources are reporting today that Paris Hilton was sued earlier this month by a woman who says Hilton stole her style ideas. (No, it isn't Nicole Richie.)
Nicolle O'Neill seems to have filed a complaint in L.A. Superior Court accusing Hilton of causing her emotional distress by stealing her fashion-related "patens" and her "stiling" tips. (Yes, emotional distress can affect your spelling.) Among the specific allegations are that Hilton stole O'Neill's ideas of wearing pants low enough to show your underwear, and shopping in vintage clothing stores for what O'Neill calls "retro" fashions. Ha! As if anybody would really dress like that!
More on this later if I can confirm it or get a copy of the complaint. According to the report, Hilton has not yet filed an answer.
Link: SF Chronicle