If your ears just popped, don’t blame the cabin pressure — blame the goosebumps. Plain White T’s just turned a routine Southwest Airlines flight into the coziest sing-along in the sky, delivering a surprise performance of “Hey There Delilah” at 35,000 feet to mark the 15th anniversary of the airline’s beloved Live at 35 program.

It was a full-circle moment. The Chicago quartet were among the very first artists to perform on a Southwest flight when the program launched a decade and a half ago, and their return coincides with the airline’s 55th year of service. Tom Higgenson (lead vocals, guitar) was joined by Tim Lopez (lead vocals, guitar), Mike Retondo (bass, backing vocals), and De’Mar Hamilton (percussion) for the acoustic set — the kind of intimate, aisle-side performance that turns strangers into a temporary choir somewhere over the continental U.S.

“We’ve played a lot of venues over time, and I speak for all of us when I say there is nothing like hearing a plane full of people singing along with your music at 35,000 feet,” said Higgenson. “We had the opportunity to perform inflight with Southwest over a decade ago, and while that can feel like it was a million years ago, not much has changed. We loved making history with Southwest and their welcoming team.”

The timing couldn’t be sweeter for “Hey There Delilah,” the quadruple-platinum, Billboard Hot 100-topping ballad that continues to rack up billions of TikTok plays and earned the band two GRAMMY nominations back in 2008. Nearly two decades later, the song is still a universal karaoke trigger — apparently even at cruising altitude.

Southwest’s Live at 35 program has featured everyone from indie up-and-comers to mainstream heavyweights, and the airline says it’s planning to ramp up the experience with more artist performances in the coming months. Combine that with the rollout of Starlink WiFi this summer, new snacks like Siete Mini Grain Free Mexican Wedding Cookies, and the debut of Cherry Coke Zero Sugar starting June 18, and Southwest is clearly leaning hard into the “flying should actually be fun” thesis.

Plain White T’s, meanwhile, remain one of pop rock’s most durable success stories — 2.7 billion global streams, a self-titled album released in late 2023, and a catalog of hooks that refuses to leave your head. Revisit the band that made your seatmate cry into their complimentary pretzels here: https://open.spotify.com/artist/1g1yxsNVPhMUl9GrMjEb2o

Next time the seatbelt sign dings off, keep your ears open. You never know who might be tuning up in row 12.