Meeting Lady GaGa!!!!!!!?

So how can you meet Lady GaGa? I'm going to her concert on march 25th at the MGM in Las Vegas. I have my reasons to why i want to meet her but if any one has met her or knows how I can, please help! what are my better chances after the Monster-ball or before? during what times does she usually arrive? also what vehicle is she usually in? I consider myself to be a dedicated fan so please help!! thanks!