Carrie Underwood is a great country singer, but she occasionally lets the world know that she can rock with the best of them. Whether it's performing with Guns N' Roses, or showing her knowledge of hard rock on "American idol," Carrie is just as comfortable in a mosh pit as she is on stage at the Opry. This week, Carrie was delighted when an "American Idol" hopeful broke into a Disturbed song during the auditions, and she was happy to join him on the mic. Kobyn Melton performed "Bodies," and Carrie wasn't going to let an opportunity to rock pass her by. She jumped up, and while Melton did most of the singing, she was right there with him. Apparently Melton's choice of songs appealed to Carrie (and Luke Bryan and Lionel Richie), as all three gave him the thumbs up after the "duet." Listen to Carrie Underwood at her headbanging best below