As of my last update in September 2021, the value of fashion brands can vary greatly and can change over time due to factors such as market trends, consumer preferences, and business performance. The valuation of fashion brands is influenced by factors like brand recognition, revenue, profitability, market presence, and brand loyalty.

Some of the most valuable fashion brands in 2021 included:

1. Louis Vuitton: Known for luxury fashion and leather goods, Louis Vuitton is consistently ranked as one of the most valuable fashion brands globally.

2. Gucci: An Italian luxury brand, Gucci is well-known for its high-end fashion products, including apparel, accessories, and footwear.

3. Chanel: Famous for its iconic fashion and perfume lines, Chanel is a highly esteemed luxury brand.

4. Hermès: A French luxury brand renowned for its high-quality leather goods, including its famous Birkin and Kelly handbags.

5. Nike: A sportswear giant, Nike is not only valued for its athletic apparel and footwear but also its strong brand presence in the global market.

6. Adidas: Another major sportswear brand, Adidas, has a significant market share in the athletic apparel and footwear industry.

7. Zara: Part of the Inditex group, Zara is a fast-fashion retailer known for its ability to quickly respond to trends and offer affordable, trendy clothing.

8. H&M: A Swedish fast-fashion retailer with a global presence, H&M is popular for its trendy and affordable fashion offerings.

9. Rolex: A renowned Swiss luxury watchmaker, Rolex is highly regarded in the luxury watch industry.

10. Cartier: A luxury brand known for its exquisite jewelry and watches.

Please note that these rankings are based on data available up to 2021, and the fashion industry is dynamic, with rankings and valuations potentially changing over time. For the most up-to-date information on valuable fashion brands, it's best to refer to the latest reports and publications from reputable sources.