The 34-year-old made the revelation during filming for Celebrity Juice with Emma Willis.
And, with Emma being the host of the Channel 5 show, Holly will have a hard time pulling out of her promise!
Teasing the idea, Emma said: "Maybe you could do a weekend? Do a secret mission?"
Surprisingly Holly didn't totally reject Emma's offer. She said: "I'd love to, I'd love to! Special mission for a weekend. I'd do a weekend."
And, defending her decision, mum-of-three Holly revealed she loves the show.
She said: "When you really love something, you should be able to have a go at something.
"When it first came on telly, it blew my mind, I couldn't believe what I was watching.
"I've watched it ever since. It's so good, it's so good."
Big Brother needs to make this happen!
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