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.

As he begins to belt the lyrics and head bang along to the beat, Underwood is seen grooving and singing with Insit

Back when she auditioned for American Idolin 2005, Carrie Underwood arrived at her Kansas City casting event every bit the homegrown Oklahoma farm girl. She was country through and through, and had grown up in the ’90s,