In tonight's live double eviction, Katie was shown the door alongside Samantha Fox and she chatted to host Emma Willis about her fallout with Frankie.
Last night, viewers saw Katie discover Frankie had nominated her and, despite having nominated him, she became seriously upset.
Speaking about the row with Emma, Katie admitted the pair had previously had a secret conversation about nominations.
"It's tricky," she said. "I knew a few days prior he was going to nominate me, so I nominated him. It all became unspoken, but I was shocked he was going to do it.
"I got confused and it upset me, because we'd got really close. Frankie came really left-field."
Katie added: "For me, when we tried to talk about it, he wasn't telling me the truth from what he'd told me in the bathroom...."
She's confused? So are we!
Despite narrowly missing out on a place in Friday night's final, Katie insisted she was happy to leave the CBB house.
She said: "It's fantastic, I thought I'd be gone on the first week. Seven is my lucky number, I came seventh on The X Factor! But I've been to one too many of Bear's pool parties to stay."
When asked why she thought she had not received enough public votes to stay, Katie replied: "The only reason I can think of is because my character isn't as strong as the others."
She added: "I think some people may mistake the fact I get on with everyone as being a people pleaser. I got on with everybody, even Bear!"
This year's CBB finalists are: Bear, Frankie, Ricky Norwood, Marnie Simpson, Renee Graziano and Aubrey O'Day.
CBB continues at 9pm on Channel 5.