Neil Patrick Harris Head-to-Head with Simon on 'Idol'

neil patrick harris simon cowell american idol

Katy Perry and Kara DioGuardi disagreed on Tuesday's "American Idol" -- and it gets a little heated between guest judge Neil Patrick Harris and Simon Cowell on Wednesday's episode!

Dallas auditioner Kimberly Carver put the "How I Met Your Mother" star and tough judge against each other when she sang an original number.

See the other stars who guest judged this season on "American Idol"

"I don't see anything current, anything interesting, anything interesting in you as a performer. That's why I have an issue," Cowell told Carver.

Patrick responded, "I disagree with you Simon." The actor continued, "I thought it was, really, quite great."

See photos of memorable "American Idols" from over the years

Fellow judges DioGuardi and Randy Jackson also agreed with NPH and Cowell was the only judge who didn't give Carver a "yes" for the Hollywood round.

Carver got the three votes she needed to continue on and announced to her ecstatic family, "Simon hated me!" She continued, "But they totally overrode him and thank God for Neil Patrick Harris. I'm going to have to go back and watch 'Doogie Howser' again!"