Adam Lambert and Chris Daughtry return to “American Idol” as mentors for a boot camp

While some American Idol winners like Kelly Clarkson and Carrie Underwood are huge stars, some of the biggest stars have actually not won the competition when they were on the show.

Jennifer Hudson and Clay Aiken for starters.

Then there are two of the biggest stars to ever come out of the show: season 8 runner-up Adam Lambert and season 5 fourth-place finisher Chris Daughtry whose seasons were won by Kris Allen and Taylor Hicks, respectively.

So who better to return to the show this season as mentors than Adam and Chris?

The will appear on the show as part of Idol mentor Randy Jackson’s “Idol Boot Camp.” Their episodes will air beginning Feb. 18 for a special three-night run.