The Swifties are sleuthing again — and this time, they found a nugget about Taylor Swift's unaccounted time in the stud!o. On Tuesday, September 18, Swift's longtime friend and producer, Jack Antonoff posted an Instagram tribute to Electric Lady Studios — the famed New York City recording studio where the pair have crafted some of Swift's biggest hits.

Jack Antonoff has Swifties spiraling after sharing a previously unseen photo of Taylor Swift in the studio last year. Antonoff, 40, included the pic in a slideshow of behind-the-scenes moments from New York City's Electric Lady Studios.

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