Harry Styles, Stevie Nicks and Christine McVie Dia Dipasupil/FilmMagic ; Kevin Mazur/Getty Images Harry Styles returned to the stage for a surprise tribute with Stevie Nicks. Styles, 30, joined forces with Nicks, 76, for a heartfelt tribute to her late Fleetwood Mac bandmate Christine McVie at her British Summer Time Hyde Park concert in London…
