The McFly guitarist - who is entering the ITV1 show alongside the likes of Mark Wright, Freddie Starr and Antony Cotton on Sunday - has received tips on how to cope with the gruesome challenges presented on the series from his close pal, who was crowned King of the Jungle in 2006.
Dougie explained: "One of my best friends, Matt Willis, has done it before. He went on to win it. When I told him I was going to do it, he told me I had to.
"He said he had the best night's sleep ever under the stars. His advice to me, however, was to make sure I don't say the magic words, 'I'm A Celebrity ... Get Me Out of Here!"
The 23-year-old star - who will celebrate his birthday in the jungle - admitted he would pay to be a part of the show, as he is "really into nature" and sees natural history expert Sir David Attenborough as a "god".
Dougie added: "I would pay to do something like this if I wasn't doing it for TV. I am so excited. I am really into nature and Sir David Attenborough is a god to me. He would be my ideal person to go in the jungle if I could choose somebody."
However, the hunk is afraid 'I'm A Celeb' could see him "lose his mind".
He said: "One of my biggest fears is losing my mind. I tend to over think a lot. If I let my head think for too long, then that is when the voices start talking!"