There's how old you are, and there's how old Spotify thinks you are.

That divide became clear this week with the release of Spotify Wrapped, the streaming platform's personalized year-end recap.

It walks listeners through their top artists, albums, genres and more in a self-reflective (and occasionally mortifying) interactive slideshow, based on data and delivered with sass. The decade-old tradition varies slightly in its aesthetics and substance every year, and this edition seemed to catch a lot of users off guard by bluntly informing them of their "listening age."

"Age is just a number, so don't take this personally," reads one of the slides, before proceeding to alternately humble, amuse and confuse.

Charli xcx, the 30-something electro-pop artist known who invented "Brat," is sp

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