The Steps star left behind an emotional Rylan Clark, who hugged her for so long that she had to console him by saying: "I'll see you in a minute, I'll see you in a minute."
In her interview with Brian Dowling, Claire described the love she received from the crowd as "overwhelming".
She went on to tell the host that she had "absolutely not" thought she would get as far as she did, having expected to "quit" or "be evicted" earlier on.
At the mention of her children, she laughed and said with a lip quiver that she was "going already". However, she insisted that she had discovered she was "much tougher" than she previously thought.
On the topic of Heidi & Spencer, she described her "absolute panic" when she found out the Hills pair had been listening in from the basement, and said she still didn't know whether they were playing a game.
She shook her head as she watched footage of 'clap-gate', and deemed Heidi & Spencer's behaviour "spiteful".
Claire also spoke glowingly of Rylan Clark, saying he has "so much energy" and is "so funny".
Photo gallery - Celebrity Big Brother day 21:
Copyright: Channel 5