Can celebrities be numbingly boring? As far as "Maps to the Stars" is concerned the answer is a big fat "Yes," but in the hands of David Cronenberg ("A Dangerous Method," "Eastern Promises") you hardly notice. Ennui and varying degrees of hysteria define this Hollywood fable where everyone is a monster, feeding off their own paranoia born of colossal self-obsession. If you've ever wondered what being a celebrity is like — and "Maps to the Stars" probably offers a good approximation of the truth — it's a world where people just can't stop talking about themselves, whether they have an audience or not.