Housemates to face Big Brother's 'Fake Week'

Just when housemates thought they knew the ins and outs of the show, Big Brother will turn the house on its head this week with a series of fake twists and tasks – and everyone will know what's going on apart from the housemates.

The first twist of the week came tonight in the form of new housemate, Pauline – who's just been 'evicted' from the Australian Big Brother house. Pauline, however, is in fact 26-year-old actress Thaila Zucchi.

Housemates were, this evening, introduced to Pauline via the plasma screen after the eviction. What the group don't realise is that their soon-to-be new housemate was chatting to them from a fake diary room just outside on their doorstep.

After 'jetting across from Oz', Pauline will enter the house during Sunday's Big Brother's Little Brother.

For the duration of the week, housemates will be set a series of Australian-themed tasks in an attempt to make Pauline 'feel at home'. However, the group's real task is to figure out that Pauline isn't actually a real housemate. If the housemates rumble Big Brother's 'mole', they will receive a luxury shopping budget for the week.

It has not yet been revealed how long Pauline will remain in the house but it is known that her stay will be a "short" one.

In line with the 'fake' theme, housemates will be under the impression that Pauline is living in a specially-decorated bedroom next door. Pauline (Thaila Zucchi), however, will, in fact, be popping in and out of the house all week, making various appearances on Big Brother's Little Brother.

Big Brother will also set Pauline personal tasks every day to keep the group on their toes.

In what will be the housemates' weirdest week of their lives, 'Fake Week' will come to a head next Friday when Big Brother has one final sting in its tail – the fifth eviction will be fake.

During tonight's live show, Davina revealed that the housemate to be evicted will be one of the real housemates, not Pauline. On leaving the house, the evictee will be interviewed by Davina while, at the same time, being watched by the rest of the group in the house.

That evictee will then be thrown straight back into the compound, the other housemates having heard everything the evictee has said about them.