As an AI language model, I don’t have real-time data access, so I cannot provide you with the latest trends on Instagram. Fashion trends can change rapidly and vary based on location, season, and individual style. However, as of my last knowledge update in September 2021, some popular fashion trends on Instagram included:

1. Athleisure: The combination of athletic wear and casual clothing, often featuring leggings, hoodies, sneakers, and oversized t-shirts.
2. Sustainable fashion: There has been a growing emphasis on eco-friendly and ethical fashion, including organic materials, upcycled clothing, and slow fashion.