Katy Perry would readily pack in her music career to become a full-time judge on American Idol if she was offered the job.

The Hot ‘N’ Cold singer sat in on the LA auditions, alongside Avril Lavigne and judges Simon Cowell, Randy Jackson, Kara DioGuardi and Ellen DeGeneres, and came to blows with a songwriter, Kara.

“The American Idol experience was awesome – if I was offered that job as a permanent host, I would ditch my career and take on that career,” she told MTV News.

Katy – who’s engaged to funnyman Russell Brand – said she gave her honest opinion on the show.

“It’s kind of like judging a talent show – American Idol was great fun. It was so easy,” she said.

“I’ve always been brutally honest. I didn’t really make anybody cry, but I did tell the truth to some kids that might have needed to hear it.”

She said: “I guess the pressure gets really on when you start eliminating the number of people that are going through.

“Ten, nine, eight, seven, six, and then you’ve got the final two. That can be kind of tense and stressful.”

American Idol is shown on ITV2.