Photos: Pharrell Williams plays Halo 3 on IMAX at UK launch

There were several launch events around Europe, in Amsterdam, Madrid, Milan and Paris. They each had a celebrity of some description, including rapper/actor LL Cool J -- who Pharrell enjoyed killing -- and model/actress/whatever Carmen Electra, who was last with a single kill (whatever happened to chivalry, boys?). These are their gamertags if you want to add them.