With the July 10th premiere of Big Brother 27 just around the corner, one theme seems to be taking center stage: secrets. Promotional material has been teasing this concept relentlessly—especially with host Julie Chen Moonves posing in front of a wall full of skeleton keys and the possible diary room photo showcasing the keys behind the couch. One line from her latest teaser has fans talking: “The keys to unlocking unexpected mysteries in the Big Brother house are right in front of you.” Naturally, the speculation online has been nonstop.