Simon Cowell has admitted that he loved working with Katy Perry, when she guested on American Idol recently.

“She’s a feisty little thing,” Cowell, 49, told US TV show Extra. “She’s quirky. Definitely got her own opinion.

“Solo artists are not used to people disagreeing with them. They are feisty and I like that.

“I don’t think she knew quite how right I was until she sat next to me.”

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