Klum took her her turn on the runway in a bronze sequin-embellished gown alongside fashion designer Zac Posen, fashion journalist Nina Garcia and actress Kerry Washington.
She probably wouldn't admit it, but something tells us Heidi secretly wanted to steal the show. A sparkling floor-sweeping gown? It's not exactly subtle, but why shouldn't a girl do everything she can to dazzle on the catwalk?
Washington's super cute floral print prom dress also deserves a mention. That's an outfit we definitely want in our wardrobes next summer.
Love Heidi's latest look? Here's 10 more brilliant style moments: