Lana Del Rey teased a new song via Instagram on Wednesday — and seemingly shaded Taylor Swift in the process.

“Track 13 @jackantonoff,” the “Summertime Sadness” singer, 40, captioned a video of herself in the car as her music played.

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Lana Del Rey sparked Taylor Swift feud rumors on Wednesday.WireImage

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The “Summertime Sadness” singer teased a new song via Instagram.lanadelrey/instagram
Swifties were quick to point out that Del Rey dropped the tease the same day Swift, 35, revealed the cover art and release date for her forthcoming album “The Life of a Showgirl” — and used Swift’s lucky number, 13, while doing so.

“Lana sharing Track 13. Same day taylor swift announced her Album,” one X user pointed out. “Knowing 13 is taylor’s lucky number.”

Others honed in on the Antonoff tag, as Swift often works with the 41-year-old producer — but did not do so for her 12th album.

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She called it “Track 13,” which is widely known to be Swift’s lucky number.Getty Images

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Del Rey also tagged Jack Antonoff in the upload.Variety via Getty Images
Swift heavily hinted at this on Tuesday when she dropped a curated Spotify playlist featuring 22 of her songs, all produced by Max Martin and Shellback.

The actress, 30, claimed on Wednesday that she didn’t “know anything” and laughed uncomfortably, before stammering, “I’ll be excited to listen to the music.”

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Antonoff, notably, does not appear to be involved at all in Swift’s forthcoming 12th album.CBS via Getty Images

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Swift hinted that “The Life of a Showgirl” is produced by Max Martin and Shellback, instead.taylorswift Instagram
One fan summed up the alleged drama, tweeting, “Lana teasing track 13 of her album and tagging co writer jack antonoff is lowkey Taylor shade because obviously Taylor announced her album covers and track list and didn’t work with jack on this album at all so here Lana goes being all messy.”

Another wrote via Instagram that they were witnessing “Kendrick [Lamar] vs Drake 2.0.”

Others, however, speculated that Del Rey is actually feuding with Ethel Cain as she name-dropped the 27-year-old singer in her lyrics.

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Del Rey’s Instagram post came the same day Swift revealed her project’s cover art and release date.taylorswift Instagram

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Fans labeled this a “messy” move.AFP via Getty Images
“Ethel Cain hated my Instagram post,” she sang. “Think it’s cute reenacting my Chicago post.”

Del Rey went on to quip that she’s “the most famous girl at the Waffle House” — referencing her 2023 waitressing stint — who is “not afraid to say I’m going down in flames.”

A Swiftie guessed, “what if taylor knew lana and jack were working on a ethel cain diss track and that’s why she decided not to work with him at all on this project?”

Reps for Swift, Del Rey and Antonoff did not immediately reply to Page Six’s requests for comment.

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Del Rey and Swift have been friends since 2012.Getty Images for ABA

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She also seemed to diss singer Ethel Cain in “track 13.”Gareth Cattermole/Getty Images for ABA