The 25-year-old's outburst came after her appeal to the viewers to keep her in the house was ignored, and left Willis somewhat speechless.
'It was so hard in the house' the US star told Willis on exiting the house.
'I was like "Should I slit this motherf****r's throat?"'
Following the rant, Willis asked if Li could perhaps understand why the public had not voted for her, upon which she responded:
'I don't know,' she shrugged. 'It is what it is.
'But I would have liked it if I had made it to the final because the first ten days were really hard.
'That place is so mentally draining. I thought I was going to walk.'
Speaking about controversial housemate Perez Hilton, Cami admitted:
'It's such a shame because I ended up f*****g hating him.
'He tried to degrade me and Chloe [Goodman] by telling us to have a lesbian fling for the cameras.'
And the reality star denies having a crush on Calum Best.
In fact, she revealed a secret boyfriend whom she had been referring to as her 'sister'.
'When I see his (Calum's) face, all I think is that's my friend,' she added. 'I don't want him like that. Honestly.'
If you say so Cami.
From reality TV to fatherhood: Calum Bestu2019s life in pictures
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Calum Milan Best
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Born February 6 1981.
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He was born in Malibu and raised in LA. He moved to London when he was 21.
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Calum is the son of the footballer George Best and model Angie Best.
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His father George died in 2005 aged 59, after suffering from multiple organ failure.
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He rose to prominence when he appeared on the ITV reality show Celebrity Love Island in 2006.
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Calum is well-known for being a ladies’ man, having had relationships with many high profile women.
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He and model Jodie Marsh dated for four months in 2003.
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In 2005 he dated Girls Aloud star Sarah Harding. They were together for around two years. Last year he revealed they once spent three days in bed together.
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Things got steamy between Calum and David Beckham’s former PA Rebecca Loos while they were both on Celebrity Love Island.
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He met Bianca Gascoigne while on Love Island, and they are believed to have had a short relationship after the show.
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In 2006, Calum had a short relationship with model Lorna Hogan. She fell pregnant and gave birth to their daughter Amelia Lucie Hogan.
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Calum and Hollywood actress Lindsay Lohan briefly dated in 2007.
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In 2013 Calum admitted to cheating on model Georgia Salpa with presenter Donna Air.
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MTV’s Totally Calum Best debuted in 2008, which saw Calum attempt to remain celibate for 50 days and 50 nights.
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Calum filed for bankruptcy in 2013, saying at the time: “I can confirm I have made the decision to declare myself bankrupt as a result of being unable to make tax repayments.”
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Calum filmed scenes for the lead role in the movie Countryman in 2014. He also appeared in adverts for Rolls Royce in Dubai.
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In November that year, Calum underwent his third £6,000 hair transplant.
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He’s tipped to enter the Celebrity Big Brother house in January 2015.