A contestant on Finland's version of The Voice won over a judge with an unlikely song for the hit show - Slipknot's "Psychosocial." 

Jani Korpela confused some of the judges with his rendition of the song, but fortunately for him, one of the judges was Hanoi Rocks' Michael Monroe, who loved Jani's performance so much that he pushed his button halfway through the song and was jumping out of his chair. 

Jani is no stranger to singing - he has a band called Red Raven Down and you can hear their music here.