When outgoing Governor of California Arnold Schwarzenegger visited 'The Tonight Show' (weeknights, 11:35PM ET on NBC), Jay Leno had a surprise for him: some footage featuring his wife Maria Shriver and eldest daughter Katherine. Katherine is a budding journalist. For 'Extra,' the 20-year-old attempted to interview her mother about last month's Women's Conference and Maria's March on Alzheimer's.

But when asked about doing the march on behalf of "Grandpa" Sargent Shriver, Maria couldn't keep a straight face. "Mommy, control yourself!" said Katherine. Then Katherine tried again but burst out laughing herself. The "interview" ended in a torrent of giggles from both parties.

Leno then showed Katherine's interview with Ah-nold, who had something witty (and probably true) to say."Can you tell us why you're here?" she asked her dad. He replied, "First of all, because your mother told me to be here ... You always do what your mother says."