Harris didn't take her coat off during the concert, so it was difficult to see the sequin cocktail dress she was wearing underneath.
In an interview with Harper's Bazaar, the designer, Sergio Hudson, said he wanted to create a tailored look for the vice president that had a touch of glamour.
"We kept the silhouette very structured and tailored, because that's who the vice president is," Hudson said. "But the liquid sequins give her glamour and shine because her influence and the way she's broken barriers is a light for so many of us. She shines so we can all shine."