Vagabon performs at Rickshaw Stop in San Francisco on March 23, 2017. Staff.

Fans who attended Angel Olsen’s concert at the Fox Theater in Oakland two weeks ago and showed up early were treated to a a special performance by opener Vagabon, who invited Olsen onstage for “Every Woman,” which the two performed together.

The performance was filmed, and the video was released Tuesday. Vagabon, whose name is Lætitia Tamko, leads with sparse guitar strumming and a solemn voice. The percussion-less song is accented by a cellist, violinist and Olsen’s harmonies.

Check out the video below and catch up with our interview with Vagabon shortly after the Cameroon-born artist debuted in 2017.