Seems like a rather unique idea but...I really don't understand the need for the celebrities. Yet. Will this be cleared up later? I don't get it.
Unless you're inserting them in the story for personal reasons, as mentioned IN the story itself...
Also, if this is some alternate reality, perhaps mention why the Twin Towers still stand. Or if possible, change the location altogether. As a side note, the Twin Towers might be a touchy subject for some here (The General Discussion board you see here today is a result of that event), New Yorkers in particular, and it might take them out of the story and...someplace else. Someplace probably not very happy.
Just a suggestion.
As for the writing itself, I like your narrative. It's easy, conversational, lil' witty and fun.
Kudos for posting your first btw.