These ladies know how to light up a room! Katy Perry first rocked the illuminating style at the 2010 Met Institute Costume Gala in her colorful Cute Circuit dress. And a week later her good pal Rihanna followed suit, glowing on stage at London's O2 Arena in a black gown with sporadic rows of tiny red lights. We think this trend seems like a bright idea, but we have one question: Are batteries included?
Photo Credit: Courtesy of iVillage