contestant": During the first weeks, a new housemate is added to the original line-up each week so that the number of housemates remains 12+1. Each "+1 contestant" is selected in a different way: Week 1: Sindia, who was told she was a back-up contestant, is surprised live on the street and given the chance to join the house immediately. Week 2: Three back-up contestants compete in a hitchhiking race from the central studio to the house. Verónica arrives first and enters the house. Week 3: A spot in the house is sold through an eBay auction that is open for a week. Arístides wins the auction at €69,100. Week 4: Marta, a back-up contestant, is surprised live at her house and given the chance to join the house immediately. Week 5: María enters the house with a secret mission related to the weekly challenge. Week 6: Cristian enters the house with a secret mission related to the weekly nominations. Week 7: An open call is made for potential contestants from provinces of Spain that have never been represented by a housemate on Gran Hermano history. Daniel is from Burgos, a Spanish province which was never represented in Gran Hermano. The soundproof room: A cristal soundproof room is installed at the central studio. The first three weeks, the two contestants that were leading the televote for eviction were taken on a van from the eviction room to the soundproof room. There, they were briefly interviewed by the host and could see the reasons given by their housemates to nominate them, so that they could defend themselves while the televoting lines were open. The non-evicted housemate was taken back to the house. From Week 16, the nominees chosen by the audience to become a finalist are taken to the soundproof room to be interviewed, thinking that they have been evicted. After the interview they are taken back to a secret room in the house. The Mouth of Wishes: The contestants can ask the Mouth of Wishes for anything, proposing a counterweight for it. The Mouth can accept the deal or not. Each contestant can make just one wish during the contest. "Turn It Over": From Week 16, when there are six contestants left, the audience votes for the nominee they want to become a finalist. While the finalist is taken to a secret room in the house, the contestants remaining at the