The nine safe housemates had to stand up live on the TV show and tell the audience who they wanted to stay in the Academy and why.
Nigel, Lemar, Ainslie and David all said that Chris's performance was the best and that he should come back to the house. Katie won support from Malachi, Marli, Sinead and Camilla.
With the vote tied the final choice was made by probation survivor Pippa, who earlier learnt she was safe when her version of Eternal Flame won the backing of the public.
The two-times survivor chose to keep Katie in the house because she thought Katie had improved lots over the last week.