Julie Chen Moonves is the host of CBS' long-running reality show, Big Brother, which premieres its 27th season this week. (CBS Broadcasting, Inc.)

Big Brother just celebrated its 25 th anniversary on July 5, with host Julie Chen Moonves marking the occasion by naming her top 25 moments of the first 25 years. But what about moving forward? With 26 seasons — plus an Over the Top installment as well as three Celebrity Big Brother editions under her belt — how much longer does “Aunt Julie” want to keep warning houseguests and viewers alike to expect the unexpected?