She added: "Matty, no pressure."
To which the ever-competitive Matty replied: "I'm crazy, you've all seen me compete in challenges!"
He told John Campbell being on the show was "Genuinely a dream come true" adding, "I'm so excited. We're heading to Fiji, we leave this weekend and we're competing for $100,000 for our chosen charity."
Matty's charity is Rainbow Youth, who will get all of the prize money should he come out on top, which is why he says, "I have to win".
Matty couldn't say too much about the project but did say that when it came to packing for the adventure there is a "very strict list and it doesn't involve much - they will check our bags before we go".
Hayley egged him on to sneak in some contraband saying: "It's about being a pirate - try and sneak whatever you can!"
Matty will leave to begin filming in Fiji this weekend.