Rihanna — The Imperial Yellow Guo Pei (2015 Met Gala)

Rihanna's canary yellow fur-lined cape by Chinese couturier Guo Pei at the 2015 Met Gala had a 16-foot train that required three handlers. It weighed 55 pounds. It took Guo Pei two years to create. The memes were instantaneous — "Rihanna looks like an omelette," "Rihanna as a pizza" — and she loved every single one. The dress made Guo Pei an international name overnight (she'd spent 30 years as China's most celebrated couturier without Western recognition). Rihanna turned a single outfit into a career-defining moment for another woman's entire life work. That's power dressing.