Halo 3 is here at last and what better way to celebrate than to have a party?  The Xbox team invited a host of celebrities including Carmen Electra, Pharrell and LL Cool J to party hard in honour of the return of the Master Chief.  Between canapés, they took on Halo 3 gamers over Xbox LIVE to test their mettle.  Check out the videos from the event here on Xbox.com!