"Inmate Idle" is the brainchild of Sheriff Joe Arpaio, who sees making the jailhouse rock as an exercise in team- and esteem-building among the population of the Phoenix facility, according to the sheriff's office's Web site.
More than 100 inmates -- all non-violent offenders -- auditioned over the last three weeks, showing off their singing talents. Now the final six -- singing tunes from Otis Redding to Garth Brooks to Creed -- prepare for the final, live competition Friday.
Just like its "American Idol" counterpart, "Idle" has viewer voting, though the 10,000 viewers are a captive audience.
Emceeing the performance will be Bob Hilton from the Dick Clark Co., which Arpaio said is considering a national talent show based on the idea.
Costs associated with "Inmate Idle" are paid from the Inmates Service Funds, Arpaio said, not taxpayer money.
Notable deaths of 2014 [PHOTOS]