'Jeopardy!' Contestant Mistakes Janet Jackson for Ariana Grande

Janet Jackson got mistaken on “Jeopardy!” for another singer you’d never expect her to be confused with — Ariana Grande … but we think this is really a famous ponytail mix-up.

Here’s what happened — contestant Alwin Hui chose the $800 clue from the Billboard Music Awards category, and it was … “As the recipient of the 2018 Icon Award, she took ‘Control’ and took to the stage in her first live TV performance in nearly a decade.”

The answer was followed by a clip of Janet performing “Nasty” at the awards show, so … pretty simple, right?

Not for Hui, who buzzed in first and guessed, “Who is Ariana Grande?”

Alex Trebek gave him a quick “no” before returning champ Sarah came correct, but naturally, people only care about Hui’s gaffe … and have been roasting him online.

To be fair, Jackson was rocking a hairstyle and getup similar to what Grande’s known for … but the Icon Award doesn’t go to artists in their 20s, and Ariana hasn’t had a chance to take a decade off from TV performances. Plus, the song clue was a dead giveaway.

Just not for poor Alwin.