Brother 4, the "X-Factor" statue from Big Brother 4, a portrait of Adria to represent Big Brother 5's "twin twist", broken fragments of Jase's piggy bank from Big Brother 5's "This Little Piggy Won The Veto" competition, Howie's lightsaber from Big Brother 6, and the nomination keys of all the previous winners. A key for Big Brother 1 winner Eddie McGee had to be produced, as the first season did not have keys. Format The format remains largely unchanged from previous seasons. HouseGuests are sequestered in the Big Brother House with no contact to or from the outside world. Each week, the HouseGuests take part in several compulsory challenges that determine who will win food, luxuries, and power in the House. The winner of the weekly Head of Household competition is immune from nominations and must nominate two fellow HouseGuests for eviction. After a HouseGuest becomes Head of Household, he or she is ineligible to take part in the next Head of Household competition. HouseGuests also take part in competitions to earn food for the week. The losing team will be forced to eat Big Brother Slop for the week. This was the first season to feature Slop as the punishment food, as it was originally peanut butter and jelly. The winner of the Power of Veto competition wins the right to save one of the nominated HouseGuests from eviction. If the Veto winner exercises the power, the Head of Household must then nominate another HouseGuest for eviction. On eviction night, all HouseGuests except for the Head of Household and the two nominees vote to evict one of the two nominees. This compulsory vote is conducted in the privacy of the Diary Room by the host Julie Chen. In the event of a tie, the Head of Household must cast the deciding vote, announcing it in front of the other HouseGuests. Unlike other versions of Big Brother, the HouseGuests may discuss the nomination and eviction process openly and freely. The nominee with the greater number of votes will be evicted from the House on the live Thursday broadcast, exiting to an adjacent studio to be interviewed by Chen. HouseGuests may voluntarily leave the House at any time and those who break the rules may be expelled from the house by Big Brother. The final seven HouseGuests evicted during the season will vote for the winner on the season finale. These