Taylor Swift, shown here kissing Travis Kelce at the 2024 Super Bowl, was spotted at Coachella similarly canoodling with her NFL boyfriend during the set of Bleachers, which is fronted by her producer (Patrick T. Fallon)

Coachella day two was heavy on alt-rock throwbacks including a highly anticipated No Doubt reunion, but it was Taylor Swift -- who wasn't on the lineup and didn't perform -- creating buzz on Saturday.

Her mere presence at the mammoth festival in the California desert set the internet alight, after she made a much-speculated appearance...as a fan, canoodling and dancing with beau Travis Kelce as Bleachers performed a rollicking set.

The rock band Bleachers is fronted by Jack Antonoff, Swift's friend and longtime producer.

Kelce's blocking skills came in handy as the 6'5" (1.96 meters) NFL tight end did well to obscure his wildly famous girlfriend from view, as the couple enjoyed the show from just offstage.

Still, an AFP journalist saw the lovebirds twirling and singing along during the performance of Antonoff, who's co-written and produced several of Swift's albums.

Fan videos quickly started circulating online. Swift's cameo comes less than a week before her forthcoming album, "The Tortured Poets Department," drops on April 19.