What is psy american idol?

As an AI language model, my database only contains information until 2021. Psy, whose real name is Park Jae-sang, is a South Korean singer, rapper, and songwriter known for his international hit "Gangnam Style." He was a guest judge on American Idol in 2013 during the show's twelfth season. Psy's appearance on the show was widely publicized, and he performed his hit song "Gentleman" during the broadcast.