1. Rio de Janeiro
2. Steven Spielberg die before finishing his version of Old Boy
3. E!Channel held responsible for the first generation of zombies
4. [empty]
5. Santorini
I'd also recommend Eixample (it's lovely and safe) and renting an apartment.
When you're there, do visit Gracia, and Torre de Agbar BUT you need to get close to it, otherwise it will just seem as just another stupid glass building.