Taylor Swift‘s joke about “jet lag being a choice” has brought heat on the singer from a range of critics.

The singer made the comment when talking to her boyfriend, Travis Kelce, at the Allegiant Stadium in Las Vegas after he won the Super Bowl with the Kansas City Chiefs.

Swift made the dash from Tokyo on Saturday night, after performing in her Eras tour, to Las Vegas, flying across the Pacific in her private jet in order to watch her man win back-to-back championships.

When congratulating Kelce on the field, Swift told him: “I’ve never been so proud in my life. I can’t believe you.”

Kelce responded by asking: “How do you not have jet lag right now?” and she joked by replying: “Jet lag is a choice.” The moment was captured on video and uploaded to social media.

Swift, who has come under fire for her use of her private jet to watch Kelce play around the country faced more backlash over the comment.

“Jet lag is a choice is an insane thing to say when you have a bed, shower, and kitchen on your private jet,” wrote one person on X, formerly Twitter.

Another added: “I’m sure the luxurious bed she got to sleep in on the jet didn’t hurt.”

And a third wrote: “I’m sure she slept comfortably the entire flight lmao.”

Jet lag is the common name for desynchronosis, which is a temporary disorder that can cause symptoms such as fatigue, dehydration, headaches, memory loss, diarrhea or anxiety among others, according to MedicineNet.

Flying through different time zones affects the body’s circadian rhythm and can cause the symptoms of jet lag. In the week prior to the Super Bowl, Swift traveled from the Grammy Awards in Los Angeles to Tokyo where she performed three show in her Eras world tour, then rushed back to Las Vegas via L.A. for the Super Bowl. Days later she flew across the world again to continue her tour in Australia.

The severity of jet lag is dependent on factors such as age, the direction of travel and importantly in Swift’s case—comfort levels.

Flying in a private jet can help ease the symptoms of jet lag because of not only the comfort, but also having attendants on hand to keep you hydrated and eating the right foods, according to Fast Private Jet.

Other perks of flying privately are the high tech lights that can help people sleep better on a flight, lower cabin pressure and better air quality.