America's First Lady joined husband Barack Obama on-stage at the Pritzker Architecture Prize event last night, and stole the show in her flowing purple gown.
Mrs O teamed her halterneck dress with a matching waist-cinching belt, droplet earrings, a chic chignon and silver sandals.
Check out our pick of Michelle Obama's top style moments below, and let us know if you think this latest look is up there with the best:
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