Taylor Swift was faced with this very question on Friday night, and apparently answered “in the most low-key way possible.”

According to Page Six, a source close to the singer revealed that Swift chose to keep it simple for her 35th birthday, celebrating in private with her boyfriend, Kansas City Chiefs tight end Travis Kelce.

According to Page Six's sources, Swift's milestone birthday night was “just the two of them,” but Kelce celebrated in another grand way.

“He got her a ton of gifts,” the source added.

Previously, a source close to the couple told Page Six that Kels had been “shopping for Christmas and birthday presents for Taylor for quite a while,” and had put a lot of thought into gifts for the “Fortnite” singer.

“[He] is not the type to leave these things until the last minute, so he's been picking out items here and there the last few months whenever he gets a chance,” the source said, adding that “the gifts were things Taylor had casually mentioned wanting” and that “Travis is always listening, even when Taylor is not aware. Travis always listens, even when Taylor is unaware,” the source added.

Some fans wondered if Kelce would be able to celebrate with Swift on her actual birthday, especially when he appeared in a video of the NFL team's Christmas party shared on Chiefs heiress Gracie Hunt's Instagram.

In a caption to a carousel post of highlights from the event, Hunt specifically called out the tight end, “Congrats to Travis Kelce on his deserved nomination for Chiefs' Walter Payton Man of the Year!” He wrote.

Kelce was seen on stage wearing a Santa hat in a clip of the post.

A Page Six insider revealed that the Chiefs' Christmas party was a “mandatory” event, but Kelce “left early to go with Taylor on her birthday.”

What the celebration was like after Kels left the work event early to be at Swift's side seems to be a secret that even inside sources cannot (or at least will not) reveal.

“Travis doesn't want to ruin any surprises, so he's only letting a few people close to him know what he has in store for Taylor,” a Swift/Kells source told Page Six last week.

It also remains to be seen whether Swift will celebrate her birthday with friends (or in public) this weekend. Last year, she celebrated with close friends, including Selena Gomez, Miles Teller, and Kelly Sperry, over dinner at Zero Bond in Noho, Manhattan, before spending the night in New York with additional guests, including Blake Lively. Alana Heim, Gigi Hadid, Zoe Kravitz, Jerrod Carmichael, and Sabrina Carpenter with fellow estates.

Incidentally, Kells was the host of Swift's 2023 birthday party and reportedly did his best to make it “the best party possible.”

In other words, it seems that when it comes to Swift's boyfriend's birthday duties, Kels is two for two.