How can I get tickets for a live taping of the second season of Sonny with a Chance?

I've been checking tvtickets constantly since february this year and tickets for a show never came up. They come up all the time for suite life, Bridget Midler's new show and even occasionally Wizards, but never for Sonny with a Chance, and I found out yesterday that there was a live taping on the 13th! But it was never on the website i usually go that claims that their studios are where sonny episodes are filmed. A little help?