Katy Perry had a hilarious reaction to a Top 11 contestant on “American Idol” during a song challenge.

The contestants took part in a “Judges’ Song Contest” where each contestant picked one of three songs

to perform without knowing which judge chose the song and had to guess who it was.

Noah Thompson selected to sing John Mayer’s 2009 hit “Heartbreak Warfare.”

The contestant, 20, from Kentucky then guessed to host Ryan Seacrest that Perry had chosen the song for him.

“I picked Katy,” said Thompson, clearly unaware that Mayer and Perry had dated.

“But honestly, I don’t know. I picked Katy. That was my guess.”

Shaking her head in disbelief, Perry responded: “Noah … I feel like maybe you should Wikipedia me,”

the “Teenage Dream” singer said awkwardly.
“That’s a big no then?” Thompson joked.

Perry hilariously yelled “I’m triggered!” before sliding out of her chair onto the floor in embarrassment.

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