Katy Perry caused some controversy when she appeared on-stage at the Kids' Inaugural Ball in Washiton, D.C. over the holiday weekend. Parents critized the costume as 'racy' for a childrens' event. The 28-year-old singer donned a red, white and blue one-piece inspired by the patrotic pin-up posters of the 1940s. Perry sang "Fireworks" and "Teenage Dream."
