The unnamed punter placed the whopping wager on Jake at a branch of Ladbrokes last night and, given the odds at the time (11/8), he will scoop a total of £24,000 if the former X Factor contestant is crowned King Of The Jungle.
Wow! It's a risk, but will it pay off?
According to the betting shop, Jake is now the firm favourite to win this year's I'm A Celebrity...Get Me Out Of Here! much to everyone's surprise!
Jessica Bridge, from Ladbrokes, says: "Two months ago when Jake was kicked out of X Factor he'd have been 1000/1 to win I'm A Celebrity.
"Now he's the red-hot favourite. It's only a matter of time before he's quoted at odds-on."
Singer Jake entered I'm A Celebrity as a latecomer along with former MP Edwina Currie and he's quickly won his way into the campmates' and viewers' hearts.
Last night, Jake was seen teasing Kendra Wilkinson with a strip dance before Edwina made the campmates chuckle by telling him he had a "chiselled face" and looked like a movie star!
Has he got what it takes to go all the way though?
Who do you think will win I'm A Celebrity...Get Me Out Of Here? Tell us below, as the best comment from across the website each week wins £50.