'The Simpsons' Celebrate 500 Episodes!

'The Simpsons' Celebrate 500 Episodes!

Matt Groening, Yeardley Smith and Nancy Cartwright chat with Access about making it to 500 episodes on “The Simpsons.” What do they say is the secret to their success? Plus, what do Tommy Chong and Blink-182’s Mark Hoppus think about guest starring on the show?