“The show is fun, but it runs the risk of becoming stale if everything stays the same,” reveals an industry insider.
“New blood will invigorate things ... Keith would be a fantastic fit.”
The country crooner, 52, is very familiar with singing competitions.
He was a coach on the first season of The Voice and did a three-season stint on American Idol.
Adds the source: “He and Nicole [Kidman] are planning on staying in Australia for a while, so it would be a pretty good gig for him."