The bubbly Gogglebox star admitted her faux pas while appearing on Alan Carr Chatty Man, saying it happened during her audition for the Channel 4 show.
"My friend Tommy was a researcher on Gogglebox and he rang me and said they needed to do an audition thing and asked if we would do it? I said ok, whatever, and my mum and dad were like all right then," she said.
"They showed us flip cards of celebrities and for ten minutes I was talking about Uncle Ben and savoury rice when it was actually Nelson Mandela! Then they said they really wanted us on the show. That is bad isn't it?
Well, she got a job out of it so presumably not!
Scarlett - who recently released a book called Scarlett Says - stars on the programme with mum Betty and dad Mark.
Alan Carr Chatty Man airs tonight, 21st April at 10pm on Channel 4
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