Harry Styles reportedly said he was "losing his shit" while on stage performing with the legendary Stevie Nicks. He brought her out as a surprise guest during his Los Angeles show at the Troubadour. They performed the Fleetwood Mac classic "Landslide" which you can watch above. Harry Styles also recently did a cover of Kanye West's "Ultralight Beam" during a secret show. You can watch more clips of the performance below.