McLean was told by Big Brother that she must not cry and was then played the message through the speakers.
Other challenges the housemates have been given as part of the task include carrying the word 'Rule' on a sheet of sugar glass, and remaining silent while objects are dropped on them from a trap door.
The task caused tension in the house yesterday when the wardens - Adam Kelly, Luke Anderson, Luke Scrase - were rewarded by Big Brother for their "hard word" in ensuring that the housemates were obeying all the rules.
Big Brother gave the trio McDonald's meals, milkshakes and snacks, much to the annoyance of their hungry rivals.
Big Brother continues daily on Channel 5.
Conor McIntyre and Shievonne Robinson are the two housemates facing eviction from the reality show this week.
Photo Gallery - Big Brother Day 35:
Copyright: Channel 5