Presenters Ant and Dec have said that it's "nice to have someone different down doing the trial" and announced their intentions to put the Irish singer through his paces.
"Kian's not been down there yet doing a proper voted-for trial," the duo told the ITV2 spin-off show. "He said he's not scared of anything in here. Heights, bugs or food challenges...so let's really go to town on him!"
Kian will tackle 'Cave Danger' in a challenge broadcast on Wednesday. He will have to navigate an underground maze while battling an array of insects and rodents to collect stars, with any stars won exchanged for camp dinners.
Chat show host Matthew Wright told the singer he was "absolutely thrilled" with the public's decision while Kian confirmed he was "up for it".
"I think a lot of people wanted to see someone other than Joey and they've gone for someone who I think could bring back a lot of stars," said Dec."Viewers obviously don't want to see them starve down there. They want to see them eat. It's quite interesting."
Bookmakers have tipped Kian to rival The Only Way Is Essex's Joey to the jungle throne. The Westlife star's current odds are 7/2 with Joey remaining the 6/4 favourite to win.