Rachel Triesman

A user's listening age is based off their preferred era of music, according to the songs they listen to all year.

Spotify says its calculations rely on the, quote, reminiscence bump, the idea that adults feel most connected to music from their teenage years.

For example, someone fond of 1970s music might get a listening age in their 60s, as if they had been a teen at that time.

That might explain why electro pop star Charlie XCX, who popularized Brat, has a listening age of 75.

Rachel Triesman, NPR News.