Katy Perry rocked an Alberta Ferretti studded denim jacket with matching high waisted jeans, a Lionel Ritchie concert tee, Katy Perry collection metallic sandals with multicolor crystal studding and a Le Vian Blackberry Diamonds® snake ring while while filming American Idol Auditions on October 29th in New York City. The next season of Idol begins in 2019 on ABC.