Every year there’s a fierce debate over what is the defining song of the summer. And while it’s only early May, a strong contender is anything by Zara Larsson. The Swedish singer has been on a tear promoting “Midnight Sun,” including a performance at Billboard’s Women in Music event. Praised for her vocals, Larsson also stood out for her aquatic-inspired look that featured pink and purple starfishes and seahorses. Styled by Caterina Ospina, the Rohit Mane ensemble was sparkly, playful, and felt like warm weather fun personified. It also makes a strong argument for something that’s been bubbling on the surface since Chanel ’s resort 2027 in Biarritz, which featured Matthieu Blazy’s take on the sea siren: summer 2026 is the season of the mermaid. “I wanted to create something very water-esque, fully crystallized and reflective, almost like she’s this dripping mermaid with starfish caught on her body as she emerges from the ocean,” said Mane of the design.…