My friend is driving me (and others) INSANE!?!?

Ok so my best friend has THE biggest obsession with Chris Brown. Don't get me wrong, I am a HUGE fan but she has gone way too far. She is determined to moved to LA when she's 18 just to bloody meet him. She literally has a 'C Breezy Shrine' on her bookshelf, talks about him constantly and talks about him in graphic ways. Since she crossed the line of fandom and obsession, she has become unbearable. He is all she ever talks about. Not to mention we are going to see him and Rihanna live in concert (WOO HOO!) but I know she will find a way to get onto the stage - people do it all the time. She even tried to send him a 'thong'. It is beyond out of control now. How do I bring her back down to earth? I tried talking to her but she said I wasn't a true fan because I hadn't made a t-shirt for the concert. What the hell?!?! Any advice would be greatly appreciated!!!! =S