What is the fine-grained topic of the following text: Why It Matters: In a sea of music-festival fashion cliches (and offensive Native American headdresses), Gomez held her own in a playful, retro-feeling spaghetti-strap HVN dress made from a lightweight silk crepe de chine fabric that was ideal for traversing the polo fields. Only return the topic.
Selena Gomez's music-festival fashion