James Gunn built his name on movie soundtracks, and Supergirl's character playlists don't dissapoint. If you’ve ever watched a James Gunn film, you know the soundtracks never miss from The Guardians of the Galaxy mixtapes to the hair-metal dance numbers that open every episode of Peacemaker. Last year, the director helped curate Superman character playlists in partnership with Spotify, and now he and the Supergirl cast are doing it again for Kara ahead of the film’s June 26 release.