16 Trends in Three Days — Coachella Just Set Summer's Entire Fashion Agenda Coachella 2026 weekend one delivered the most commercially complete festival fashion moment of the year — Hailey Bieber's vintage 1998 Christian Dior slip dress at Rhode World, fringe everything, gem-set glam, elevated western, sheer excellence, layered belts, micro shorts, and crocheted skull caps all confirming that festival fashion has graduated from niche style occasion to mainstream summer trend