Viewers learned over the past week that the Essex boutique owner had been battling health problems in the house, although they were not referenced on camera until tonight's finale episode.
After leaving the house in fifth place, Sam admitted: "I enjoyed the experience but I'm never ill, and for two weeks I was ill in that house and on antibiotics. I can't tell you how gutted I was."
She told Emma Willis that being ill had changed the experience for her, adding: "One night I was in bed crying thinking, 'What have I done? It's the most amazing thing I've done so far in my life and I'm ill.'
"Every night everyone was drinking and getting drunk. I was gutted. I'm the big party girl, the ringleader of all my friends, out every weekend. Tonight I was like, 'Pour me a glass of champagne, I don't care!'"
On tonight's finale, viewers saw Sam thanking her fellow housemates for being supportive during her illness, and she reiterated this on leaving the house. "They are all amazing people."
The exact nature of her illness has not been revealed, but it's been reported that Sam's face became swollen following a mystery allergic reaction, while she has also suffered an upset stomach and was even rushed to hospital last weekend.
This year's CBB housemates in pictures:
Copyright: Channel 5