The CW

Katy Perry unveiled Prism, her first studio album in three years, last night (Oct. 22) at an album listening party that doubled as the inaugural event for the new iHeartRadio Theater in Los Angeles. The album, she said, helped her find her own voice. Perry, 28, kicked off the evening in front of about 400 close friends and fans, known as “Katycats,” with an electrified performance of her hit song “Roar.”...