'I've been here too long, I've got to come home,' he admitted, a little embarrassed.
But Karl thought he'd rib his mate a bit more.
'It's outrageous! It's un-Australian, Cody!'
To Cody's credit, he's been living in America since he was 12 - and now, at 23, lives in California with his girlfriend, Miley Cyrus.
Earlier this week Cody sparked speculation that he and Miley were expecting a baby after he hinted at the pair relocating to Australia to start a family.
“I would like to return back in Australia for sure,” Simpson told The Sunday Telegraph.
“I miss Australia a lot. I would like to come back more. I will always have a home base in LA, but Australia will always be Number 1.
“LA makes a lot of sense for me for work but I will always be an Aussie.”
When confronted on whether he would indeed raise a family Down Under, he replied: “Absolutely, yes”.