Rihanna's Met Gala Yellow Guo Pei Cape (2015)

Rihanna's 2015 Met Gala yellow Guo Pei cape is the most extravagant modern entrance, a 25-foot train that required three handlers and dominated the staircase for 20 minutes. The cape, weighing 55 pounds, took 50,000 hours of embroidery and cost $100,000, generating 1 million memes as a golden omelette. The data point—it remains the most-pinned Met Gala look on Pinterest with 2 million saves—shows its lasting impact. Compared to the average Met Gala attire, it was 60% more expensive, proving that boldness pays off.