The “Dark Horse” singer is prepping for her halftime performance. Katy has brought in one of her favorite designers Jeremy Scott to collaborate with her. And she promises her performance to be very colorful. Perry’s first costume is an orange, red, and yellow short ensemble with plenty of sequins. A second adds that she will be opening with “Roar” and closing with “Firework.” While Missy Elliott and Lenny Kravitz are confirmed to join Perry at halftime, she is remaining tight-lipped on the details of her looks.