Good Morning America Concert in Central Park? Tips?

My friend and I are planning to go to the Idol concert in August for Good Morning America. I've been to a couple shows from the Today Show Series at Rockefeller Plaza, but never for GMA. We are planning to get there around 2am for good seats. Is that good? I'd love some tips and information on where people line up, what happens, etc, from people who have gone. Thanks!