Professional dancer Kristina is among the stars taking part in the 17th series of the Channel 5 reality show, and with cameras filming her every move 24/7, there really is nowhere to hide.
Speaking on BOTS last night, her ex-Strictly judge Craig said: "Of course, you have an onscreen persona and your natural personality backstage and they are two completely different things.
"I think here we have an opportunity to see the real Kristina which is actually very kind and loving and giving and caring and sharing. On the other hand, if anything riles her, it's like the Cold War from Russia. I'm not joking. She's feisty. You will see that. That smile will go, she will turn - and if she doesn't have any make-up on it's even scarier."
He added: "I think you'll see her fiery side and the side she doesn't want the public to see and I hope that does happen, that we see the honest, truthful Kristina. I would love this show to break down that persona."
Ahead of entering the house, Kristina said she was hoping that viewers saw a different side to her than the one they're so familiar with from Strictly.
"On a show like Strictly Come Dancing, you're not there to show your own personality. You're only there as a dancer and a choreographer and a mentor. It was an incredible platform for me to show my skill and my dancing. But I thought maybe it's time to do something for myself and show who I am as a normal woman. To get up and be 'me' without make-up and hair."
CBB airs nightly on Channel 5.