Carrie Underwood is a judge on American Idolnow, and she recently joined a contestant singing Korn and Drowning Pool classics during his audition. The country vocalist became a superstar after winning the fourth season of American Idol back in 2005.

American Idol is back once more to showcase new competition and talent. But this year will feel a little different with Katy Perry stepping down. Perry has served as a judge since the series was rebooted in Season 16.

Carrie Underwood's debut as an American Idol judge took an emotional turn when a heartfelt audition left her wiping away tears.