The 35-year-old TV presenter revealed yesterday that she had fallen ill with the flu, and was resting up in bed.
Posting a selfie on her Instagram page, Caroline apologised to her good friend and fellow TV presentre Laura Whitmore for missing her jewellery launch party.
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She captioned the make-up free snap: "Massive fluey shout out to @thewhitmore for her launch tonight! Sorry I can't be there.... He's me in my fave Daisy necklace for you Laura !! You are LOVELY."
According to a source, Caroline is desperate to feel better by Saturday – but 31-year-old Olly may well be on his own.
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“She has been resting at home and doing everything she possibly can to recover in time to make it on stage with Olly on Saturday night,” a source told The Sun.
“But at the moment it is touch and go, and it’s a worry for everyone. The first live show performances each series are when X Factor really gets going.”
However, it seems like Caroline was forcing herself to feel better as this morning she was up and about and signing more copies of her new book, Storm in a C Cup.
"Morning!!!! Up and at it! More book tour today! See you in a bit Bluewater," she tweeted to her 1.84 million followers earlier today.
The X-Factor live shows begin on ITV on Saturday, 31 October at 8pm.