it. Should a HouseGuest choose to open Pandora's Box, both good and bad consequences could be unleashed into the house, which impacts every HouseGuests in-game including the person who opens it. Similar formats are applied in later seasons, for example, the Den of Temptation introduced in season 19. Other variants such as the Coup d'État, allowed the holder to remove one or both nominees from the block on eviction night, as well as choose who is nominated in their place. A different variant, dubbed Diamond Power of Veto, was seen during Big Brother 12 (2010), which allowed the user to remove one HouseGuest from the block and choose the replacement nominee. Season 14 also had a Diamond Power of Veto which carried the same functionality as a standard PoV. In some seasons, such as season eight, season 10 and season 16, the public voted for a set of HouseGuests who would work with the public. On each pre-determined periods throughout the entire season, the public voted for one of usually two possible actions the HouseGuests would want to perform, and HouseGuests would earn prize money if they were able to complete the action. Many seasons have featured twists in which evicted HouseGuests (except for HouseGuests who either walked or was removed) can win reentry into the house, either by public vote or competition. Normally, this involves sequestering each eliminated contestant individually or in the jury house (depending on whether the twist occurred pre-jury or post-jury, respectively). America's Favorite HouseGuest Introduced in season seven, viewers of Big Brother cast a vote to decide the fan favorite HouseGuest for a cash award of $25,000 on every season except Over-The-Top. The results are announced following the finale of the respective season. During the season's debut, the award is only eligible to the Jury of Seven (hence the award was called America's Favorite Juror or America's Choice Jury Prize), before expanding the eligibility to all HouseGuests including the winner (excluding any HouseGuests who either withdrew or was forcibly removed from the House) beginning season 11. The voting percentages were also revealed live but it has been dropped since season 17. Broadcast Since its launch in the United States, Big Brother has aired on CBS. The show is simulcast in Canada on Global. The fourth and ninth seasons have both aired in the United Kingdom, the latter airing in the Spring season. The first season