Kelly Clarkson is poking fun at Clay Aiken ‘s cleanliness habits in the kitchen.

On a recent episode of The Kelly Clarkson Show , the 43-year-old singer revealed that she once played a sly prank on the fellow American Idol alum after observing his meticulous refrigerator system.

“I had a friend who I used to mess with. He looked like a serial killer with his refrigerator. I went to his house, and I was like, ‘The hell?’ He had everything so and just to f— with him, I moved everything around,” she said.

“And it did mess him up. But It did look like a serial killer lived there, how his refrigerator looked! I like things tidy, but everything had to be certain,” she added.

Clay , 46, later responded to the story in good humor, saying that her re-arranging helped change his ways.

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