'Big Brother': Julie Chen Moonves Claims Another Famous Anchor Was First Choice to Host! (Exclusive)

Julie Chen Moonves chats with ET about the early days of 'Big Brother,' including the famous face who was first approached to host the reality TV phenomenon. The former CBS News anchor reflects on the show's enduring popularity for 25 seasons, from the access to 24-hour video feeds to the fascination with mundane details about how the houseguests cohabitate under one roof. Season 25 of 'Big Brother' premieres Aug. 2 on CBS.  ET's special, 'Big Brother: 25th Anniversary Celebration,' airs July 26 on CBS.