The day before Rosalía announced her fourth studio album, Lux, she posted a video of herself on Instagram with classical music playing in the background.
It was a teaser for how her new album was going to sound. In the opening seconds of lead single Berghain, violins are followed by a choir singing.
The popular Spanish singer, who is classically trained herself, collaborated with the London Symphony Orchestra (LSO) on the project.
It's also sparked suggestions that it could switch a new generation of young listeners on to classical music.
But, as BBC Newsbeat's been finding out, many of them were already well aware of it.
