A mystery woman captured the heart of the internet over the weekend, after Los Angeles police posted footage of her singing in a subway station.

“4 million people call LA home. 4 million stories. 4 million voices…sometimes you just have to stop and listen to one, to hear something beautiful,” reads an LAPD HQ tweet accompanying the widely shared footage.

The woman, wearing pigtails and holding onto a large cart, belts her haunting song as she stands on what appears to be an empty platform in Koreatown.

The video was shot by an officer with the city’s Metropolitan Transit Authority, according to KABC-7.

The songstress has not been identified.