It was nearly impossible to escape Taylor Swift mania in New Orleans last October, when thousands invaded downtown to trade friendship bracelets, sing the 10 minute version of "All Too Well (Taylor's Version)" on Bourbon Street, and spend cash on merch before attending The Eras Tour.

The three-night concert at Caesars Superdome was one of the largest tourism events in the city last year, with Swift giving several nods to Big Easy in her performances.

But only some Eras Tour concertgoers were included in the big Saturday surprise: pop star Sabrina Carpenter joining Swift on stage for two songs, "Is It Over Now" and "Espresso."

The moment went viral, with a Nola.com video of the performance getting millions of views. Swift later thanked Carpenter for coming to Crescent City and joining

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