Kendall Jenner, Devon Lee Carlson Photo: Gracie BellissimoCalifornia girls: unforgettable, undeniable—as per Katy Perry—and also undoubtedly aware of what makes a great summer outfit. For their first collaboration, which launches today, SoCal natives and longtime friends Devon Lee Carlson and Frankies Bikinis founder Francesca Aiello have teamed up on a joy-filled collection, aptly called Sunshine Girls. “Everything about this evening feels so magical…the location, the sunset, the way everyone looked in the collection,” Carlson told Vogue. (The archival fashion-inspired collection also includes Y2K-worthy low-rise jeans, a notable first for the swimwear and ready-to-wear brand.) To end the evening, the group surprised Carlson with a nostalgic pink tiered cake in honor of her 32nd birthday.