Olivia Rodrigo made a surprise appearance during Addison Rae's Coachella set on Saturday, and Halsey was one of the attendees in the crowd.
The 31-year-old musician took to Instagram after the performance and shared a video of the drivers license hitmaker's performance and wrote, "favorite girl" over it.
The Bad at Love songstress have been supportive of Rodrigo, 23, since the beginning of her career - from celebrating the success of her debut song to attending professional events together.
During the Coachella weekend two, Rodrigo appeared in the middle of Rae's song Headphones On , and completed it with a duet.
The Grammy winner also debuted her recently released single, Drop Dead , from her upcoming album, you seem pretty sad for a girl so in love.
