Hillary Clinton is a lady in blue. Photo: Pool, Getty Images

On December 5, Hillary Clinton attended a Washington, D.C. event, and her formal outfit caught our eye.

Hillary rubbed shoulders with some fellow Kennedy Center honorees in a royal blue off-shoulder dress with elbow-length rouched sleeves, a V-front neckline, and iridescent fabric.

We only have one question: Where's the corsage?

The 80's style gown gave us total fashion flashbacks! Everything from the color to the cut to the fabric embodies the bold, glitzy style of our favorite fashion "don't" decade.

Even the evening's festivities supported our theory: The night consisted of a limousine arrival, followed by dinner with some of Hillary's political peers, which the group capped off by a posed photo op. What could be more prom-like than that?

No word on whether the Department of State played any Fleetwood Mac, or if Bill asked Hillary to dance.

Check out more of Hillary Clinton's best and worst fashion moments -- click through the gallery below: