Fred Bronson

American Idol mentors

'American Idol' Alums Jordin Sparks, Chris Daughtry & More on Coming Home to Duet With Season 15 Singers

The producers of American Idol promised that the final chapter of the long-running series would honor the show's history. While it's still early in the current season, they are already keeping that pledge, bringing back 12 Idols from years past to duet with contestants from season 15. On Thursday night (Feb. 19), Idols from seasons 4 (Constantine Maroulis), 5 (Chris Daughtry, Kellie Pickler), 6 (Jordin Sparks), 7 (David Cook) and 10 (Haley Reinhart) will mentor and sing with 12 of the finalists from the top 24.

'American Idol' Top 24: Meet This Week's 12 Finalists

The second half of the season 15 American Idol top 24 compete Wednesday night (Feb. 17) and Thursday night, following the pattern set last week by the first half of the top 24, with the contestants performing solo and then duetting with former Idol contestants.