Lucy Pinder, Tina Malone and Coolio, who are playing celebrity photographers as part of the task, almost missed Michelle when she appeared in a cherry picker over the wall.
“Oh my God!” said Lucy, when she saw her glamour model counterpart. “That’s my friend Michelle Marsh.”
Fellow pap Tina was bemused by the stunt, admitting: “I don’t know who she was, but I took a picture.”
As Michelle was lowered out of view, Lucy gushed: “Bye! Your hair’s really nice!”
The shopping task will consist of five separate challenges, and the housemates must fail no more than two of them.
As well as Lucy, Tina and Coolio’s paparazzi challenge, Ben Adams and Michelle Heaton must become a fake celebrity couple, while La Toya Jackson and Tommy Sheridan will have to star in a reality TV show.
Ulrika and Verne Troyer must become Diana Ross and Lionel Ritchie and perform a cover of the pair’s classic duet, Endless Love, while Mutya Buena and Terry Christian will have to worship at the shrine of a Celebrity Cult.
Lucy faces eviction alongside Ulrika Jonsson on Friday night, but Michelle told the Daily Star that her pal wouldn’t be affected by it.
Michelle said: “She won’t be upset about being put up for eviction – she knows it’s just a game.”