The aspiring singer, 26, stripped to his birthday suit for the iconic magazine's latest centerfold to raise awareness for Cancer Research UK.
And it's a cause very close to his heart.
Jake said: "I've lost my dad and brother to cancer – it affects everyone somehow. My brother Oliver had Osteosarcoma (a form of bone cancer), once he was told it was terminal he was determined to live a normal life where he could, which is why he proposed to his girlfriend before he passed away at 19.
"He showed me that you have to live every single day as if it's your last. Follow your dreams and if you're in love with someone tell them because you don't know what's around the corner."
Jake said that posing naked for the magazine had "been nerve wracking" but he was happy to do it.
"I'd do anything for a charity like this because it's so close to my heart," he said. "Cancer Research UK are working so hard trying to find a cure and one day it will happen. In the meantime, men and women should check themselves for lumps and if anything doesn't feel right you need to get it checked out as quickly as possible."
Jake's photoshoot was released as he made his entrance on I'm A Celebrity.
Following his second appearance on X Factor - and his elimination last month - the singer is now off in Australia aiming to be the next King of the Jungle. He made a late entrance on the 14th series of I'm A Celebrity alongside Edwina Currie.
Jake posed for the January issue of Cosmopolitan, on sale 4th December, to raise awareness of cancer for Cancer Research UK. Available in digital edition on Apple Newsstand
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