Michelle Obama [1] transported followers to 1982 on Tuesday with a throwback prom photo [2] from her high school days. The former First Lady has been our style icon [3] since she became a public figure, but this "Prom Challenge" picture also shows she had fashion as a teen too. The high-slit on her pink satin polka dot dress? Legendary. Her look is so great, it inspired celebrities like Tracee Ellis Ross and Kerry Washington [4] to share photos of their prom outfits too.

These blasts from the past serve as a helpful (and timely) reminder to register to vote, too. "If you're a student or teacher, join the #PromChallenge with @WhenWeAllVote and @MTV and tell us what your school is doing to register students to vote — you could get a free prom for your school! Learn more at prom.mtv.com [5]," Michelle, a When We All Vote co-chair, wrote in her caption. "You can also help me spread the word by posting your prom photo with #PromChallenge." According to MTV's website, up to 20 schools will be selected to receive up to $5,000 for their dream prom. If you needed an incentive to get ready to vote, this just might be it!

Ahead, see how other celebrities celebrated the #PromChallenge. Tracee, we bow down to your badass high school self and that Armani ensemble.