The X Factor duo, whose outrageous actions have included starting foam fights and turning the bathroom into a water park, crawled out of the Diary Room on all fours wearing bonnets and nappies.
One of the pair approached a cackling Kerry Katona and brandished a bottle, begging for her to get them some milk.
"Is this a task?" the bewildered Coming Clean star asked. "What the hell is going on? Have you got to be like this all day?"
Watch Jedward turn the Big Brother bathroom into a water park below:
Her requests for information were ignored, however, as the 19-year-old curled up on the floor to sleep, prompting her to declare: "This house is crazy!"
Despite initially embracing his new identity, Edward later bemoaned to Tara Reid: "I've got to wear a nappy, like, what the hell?"
Jedward then crawled out into the garden, where they asked the American Pie actress to teach them to walk.
The brothers were yesterday ordered to do all the washing-up in the Big Brother house after losing Marco Pierre White's cooking challenge.
Watch Jedward act like babies below: