On Friday, during his set at The Troubadour in Los Angeles, Harry Styles brought out a surprise guest, Stevie Nicks, who joined him onstage to perform his single, “Two Ghosts,” and the classic Fleetwood Mac song, “Landslide,” off the band’s self-titled LP. Fans in the audience have posted videos of their duets. Watch below. Styles jumped off the stage to watch Nicks sing. Styles even baked Nicks a carrot cake once, according to Rolling Stone.