The pair had to win the other housemates a luxury shopping budget by 'hacking' into the alien supercomputer.
As the aliens have been observing the housemates for some time, they seemed to have set their security questions based on facts about the housemates, with all the answers being numbers.
Dappy and Evander had to correctly answer three questions by physical playing the number buttons onto the computer.
But a wrong answer meant a gunging from the computer's elaborate security system.
Questions included the position that Lee Ryan's boyband Blue managed in Eurovision and the length of Jasmine Waltz's sex tape.
If code was cracked in time the alien mainframe would be destroyed and the housemates would win this weeks luxury shopping budget.
Celebrity Big Brother airs tonight at 9PM on Channel 5.
Browse pictures of the task below...