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The DIY SOS presenter strutted around camp in just his swimming pants, stealing the limelight away from the rest of his co-stars.
Nick offered up his services when the campmates realised they needed to get fresh water, and he and Emily Atack went off to fill up their buckets.
But Nick seemed to decide that his clothes would have hindered him during the task, and stripped down to just a pair of speedos.
Explaining his bold decision, the TV personality told Emily: "You'll have to excuse me doing it in my swimming trunks but you get so wet."
Inbetweeners star Emily replied: "This is so mental, I love that the socks match as well."
Nick left viewers at home just as flustered, and fan took to Twitter to post hilarious reactions to what they were witnessing.
Nick knowles in speedos that's definitelyme voting to keep him in :stuck_out_tongue_winking_eye::stuck_out_tongue_winking_eye:#ImACeleb- Joanna Mc (@mc_joannamarie) December 4, 2018
Just seen Nick Knowles in Speedos.:flushed:- Five Year Plan (@FYPFanzine) December 4, 2018
"Everyone knows Beyonce Knowles is Nick Knowles sister he's bootylicious in those red speedos," joked one person watching at home.
While another echoed: "Nick Knowles In those speedos, Night made!"
"OMG as if I didn't like #nickknowles enough #speedos want to marry him even more now!" and a third I'm A Celeb viewer chimed in.
Somebody else tweeted: "Nick knowles in his speedos ....I can never unsee that."
Earlier this month, Nick sent social media into meltdown with the same pair of very revealing swimming trunks after he stripped off to wash away the leftovers of a Bushtucker Trial.
The TV presenter had been left covered in hundreds bugs and creepy crawlies after a gruesome challenge, and took to the jungle showers to clean up.
I'm A Celebrity continues on ITV tonight at 9pm.
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