Haha, LastWish23x I've played through that situation in my head many many times, thinking of all the formal stuff i would say. But I guarantee you, in reality, I would be too exited to even speak clearly. My ideal greeting goes something along these lines:
"Hi Behati! My name is __ and i just wanted to say that i've been a huge fan of yours for YEARS. I have so many things I've wanted to ask you, would it be possible for me to buy you lunch over an interview?"
Most likely to ACTUALLY happen:
"OMGOMGOMGOMGOMG WAAA!!!! :hell yea!: OMG It's BEHATI freaking PRINSLOO!!!! Can I get a picture?? *snap* OMG thank you so much!!" And then I walk away wishing i had said/asked way more. For the next several hours/days, I beat myself up inside for not doing more and obsess over what I should have said.
Ok, maybe not quite that extreme, but you get the idea XD
</late-night delusional rant>
And silken, I hate you You're so lucky!!!!!!! It seems like all the people who aren't particularly TRYING to meet someone end up being the ones who do. And the people who really DO want to, never can