Watch Casey Abrams Perform First-Ever Nirvana Song on 'American Idol'

By:OK! Staff

March 17 2011, Published 3:58 p.m. ET

Casey Abrams was the first American Idol contestant ever last night to sing Nirvana! Casey chose "Smells Like Teen Spirit" as his song to sing from the year he was born, 1991. What did you think of his performance?

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"Casey, you are so good man," Steven Tyler said after the performance. You are so crazy and you are so talented and that's the perfect match. To be crazy and talented and have it all together at the same time, that's the goop that great stuff is made from. And you got it man, you got it."

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"Kurt Cobain's got some big shoes to fill with that song. It was a risk." Jennifer Lopez said. "There were parts of it where it got a little bit screamy screechy. He had the intensity, but he didn't scream all the way. It still has to sound pleasant and all of your performances are so pleasant and so amazing to listen. I just wish it had a little bit more of that, but you know I love you so much."

"What I am most impressed with and what I love about you and what you represent like great other bands...you love taking risks," Randy Jackson said. "I love that you are putting art first and then thinking about commerce. It wasn't your best performance or the best vocal or anything, but I like that you're fearless. That's what we need! Fearlessness, come on!"