The contestants must take part in all the party games and pass all Big Brother's party challenges to avoid being left with budget food for a third week in a row.
Five housemates will have to take part in a Children's Party challenge involving an assault course, jelly and ice cream, a bouncy castle and a ball pool.
The girls will take part in a slumber party pillow fight, which the boys must watch and guess correctly who will win.
All 10 housemates will be involved in a dinner party task, which will task them to have intellectual discussions on subjects such as fame or fortune, looks or personality and 'Should the BB prize money be split?'
Three housemates will battle an All Nighter challenge and will have to keep raving all night in the task room.
Meanwhile, throughout the challenge, whenever the housemates hear a 10, 9, 8 countdown, they must gather in the Living Area, hold hands and sing Auld Lang Syne for a New Year's Eve party.
Further party tasks will be revealed tomorrow.
Eight housemates face possible eviction this week with only Becky Hannon and Scott Mason not facing the public vote.
Big Brother continues daily on Channel 5.
[Photo Gallery - Big Brother Day 48]
Copyright: Channel 5