Luke Bryan posted a throwback video on Instagram to mark 13 years since he shared the stage “with my friend,” Taylor Swift, in Nashville, Tennessee.

Some Swifties think it could be an “Easter egg.”

“Lucky number 13 years since performing with my friend [Taylor Swift] in Nashville,” Bryan wrote in his caption. The clip shows the moment Bryan appeared as a surprise guest at Swift’s Nashville stop on her headlining “Red Tour” in September 2013. The pair performed Bryan’s “I Don’t Want This Night To End,” a hit single that appeared on his 2011 studio record, Tailgates & Tanlines.

Some commenters think Bryan might have shared the throwback clip to hint at another performance on the way. The five-time Entertainer of the Year, who just released his ninth studio record, is getting ready to return to the Bridgestone Arena stage on Thursday (September 24) for his Luke Bryan & Friends Show, a “one-of-a-kind” event at a venue he’s sold out six consecutive times, according to a press release issued earlier this year. Supporting acts include Avery Anna and DJ Rock; however, special guest appearances by additional “friends” remain under wraps as of publication time on Monday (September 21).

“Luke you perform in Nashville next Thursday… are you not telling us something??” one Instagram user commented.

Some pointed out the connection between the timing of Bryan’s throwback and the fast-approaching 20th anniversary of Swift’s debut record, which fans hope will receive a re-recorded Taylor’s Version in the foreseeable future. One commenter wrote, “oh so you're going to be featured on debut tv is what im hearing... and i cant wait.” Another said, “this is a debut tv Easter egg I just can’t prove it.”

Some noted the “sus timing” between Bryan’s post and Swift’s first CMA nomination in four years. Earlier this month, the Country Music Association announced nominees for the upcoming 60th annual show. Swift received a nod in the Single of the Year category for “I Knew It, I Knew You,” which appeared on the Toy Story 5 soundtrack. Swift reacted on her Instagram story at the time, “LOOKS LIKE I HAVEN’T YEE’D MY LAST HAW THANK YOU CMA!!!! See you there Nov. 18 🤠”

Other Instagram users wrote in the comments on Bryan’s throwback clip: “is this an easter egg what’s happening here 👀,” “This has to be an Easter egg… cmon Luke, what are you telling us??,” “hey luke what is this about 👀,” “Why are we posting this Luke 👀👀👀,” “As a swiftie and a life long Luke fan, this is sus…… im [clowning].”

It’s unclear as of publication time whether Bryan’s memory with Swift is an intended “Easter egg” (or if it is, what it could mean). See it here: