Katy Perry stripped down to a playful body suit while performing her latest single, "Birthday," at the 2014 Billboard Awards on Sunday. The 29-year-old pop star rocked a bright green wig during her balloon-adorned performance, which was pretaped during her Prismatic tour in Newcastle, England, earlier this month. Perry released the official clip for "Birthday," the fourth single off her fourth record Prism, in late April. The video finds the singer in different costumes as she crashes several birthday parties pretending to be a clown, an aging dancer, a Bar Mitzvah MC, an animal expert, and a princess. Other celebrities who performed during Sunday's Billboard Awards included Shakira, Florida Georgia Line, Ariana Grande, Iggy Azalea, and many more. You can check out Perry's performance below.