This is a little misleading (imagine that).
Per the auction it looks like the lucky winner and a guest will attend the movie premier and have a brief "meet and greet" with the lovely Miss Johansson. Hardly spending the night with her.
I don't see any Hollywood actresses that seem THAT hot, anymore. At least, they're not any more attractive than the women I work with every day. Of course, you can make a woman seem more attractive with lighting, makeup and camera angles, but they're just people.