Following the past year of a grueling world tour, Ryan Castro has come home. The Colombian superstar sold out Medellín’s Estadio Atanasio Girardot on April 25, with 47,000 fans waiting to dance to his unique mix of reggaeton hits and dancehall smashes. That rare blend of street and Caribbean culture is also reflected in Castro’s style, such as a necklace of icy bling tucked under his bright yellow suit. The five-hour concert was sandwiched in between performing during Karol G’s headlining set at Coachella and dropping a collaborative album, Omerta , with Medellín icon J Balvin on May 7. While there’s a lot resting on Castro’s shoulders, he always sees the most important moments in his career as something that’s bigger than him. “I’m not putting on a Ryan Castro concert, but I’m putting on a concert for the people from the barrio [hood] and people that are fighting for their dreams,” he tells SPIN from backstage at the Estadio Atanasio Girardot.…