If you run out of the show and make ur way back to the backstage door like right away after the show you can be one of the first at the barriers! hehe that way ur sure to get his attention
I met him before the show and there were only about 4 other people waiting for him. But then I went after the show and there were about 50 or so people waiting but i managed to get to the front before he came out. I heard he waits around til everyone who wants a signiture, gets one! How nice
Good luck! Just remember... its JOSH... so dont be shy and stand back!