Please, islam. May your next targets be the Oscars and the MTV awards.
Excellent idea! Hey, muslimes! You really want to make an impression? Bomb the Oscars! Better yet, start assassinating celebutards. They're the only important people in America, you know. Whack a dozen of them and you'll make the front page of every paper in the world and be headline news on every network for weeks.
Besides, if it's immorality and deviance you're attacking, there's no deeper cesspool of those than Hollywood. Plus, you can get maps to their homes really cheap on just about any street corner in LA.
I've been to an Oscars, and there is always a very heavy armed police presence... including snipers stationed on nearby rooftops.