A Taylor Swift clue on "Jeopardy!" left all three contestants stumped on Wednesday night's show.

Contestant Matt Mierswa chose a clue in the "Title That Completes the Rhyme" category for $400, and it just happened to be Swift-related.

"And I’m just like oh-oh oh-oh oh-oh oh-oh oh-oh, you need to just stop, like can you just not, step on my gown?" Host Ken Jennings read off the clue card.

"I really wish this was Johnny [Gilbert] reading these," Jennings responded when Mierswa was unable to give an answer. "This is ‘You Need to Calm Down’ by Taylor Swift."

Taylor Swift

Taylor Swift fans took to Twitter to criticize "Jeopardy!" contestants after they missed a clue about the pop star on Wednesday's episode. (Nicky Loh/TAS/Getty Images for TAS)

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Taylor Swift performs

The answer was "You Need to Calm Down" by Taylor Swift. (Kevin Mazur)

Fans were quick to jump on Twitter and complain about the contestants not recognizing one of Swift's famous songs.

"None of the jeopardy contestants got the Taylor swift clue shut the whole show down," one user wrote.

"Everyone who makes it on to #Jeopardy clearly has a crown in my book, but I cannot calm down when there is a triple stumper Taylor Swift clue," another added.

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"THE WAY NO ONE KNEW?!?!?" one user said.

However, not everyone watching from home knew the correct answer.

"Wow @jeopardy may have had the "youngest" category ever with the complete the rhyme. Even I was too old to get the @taylorswift13 question," a user wrote.

Ken Jennings on Jeopardy

Ken Jennings is filling in as the host of "Jeopardy!" (Jeopardy Productions Inc.)

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Mierswa still finished in first place during the "Jeopardy!" episode, his winnings reaching $26,644.