It's a beautiful day to be a Mango member. On May 12, the Spanish retailer released its Summer 2026 campaign, starring longtime Mango girl Hailey Bieber . The brand teased her latest modeling gig last week, but now, Bieber's Mango outfits are live for the world to see—and draw early-summer style inspiration from. Almost exactly a year after Bieber stacked the capri leggings trend beneath a trench coat from Mango, the Craft Your Own Story ad made her affinity official. She posed in front of the L.A. skyline for photographer Anthony Seklaoui wearing head-to-toe Mango. Every summery set could join Bieber's seasonal wardrobe with ease, especially the windbreaker , peekaboo button-down, and neck tie trend she paired with billowy, already sold-out gingham boxers . (She styled almost-identical micro shorts last June.) Hailey Bieber opened Mango's Summer 2026 campaign in boxers and a funnel-neck jacket.…